Agree completely -- my one complaint about my pair... the pleather ear cushions and head band (cushion) have disintegrated. I think the former may still be available; I don't think that the latter is. They still feel OK, but after wearing them, one has little bits of pleather in one's (remaining) hair and facial regions.For a long time at work I used the Sennheiser HD212 Pro headphones. They were cheap and if someone stole them I wasn’t out a ton of money. They are discontinued now by Sennheiser but you can still find them on the internet from time to time. These were gentle on the ears and pocketbook.
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Found my old pair of koss ksc-75 lying around, the foam pads had long ago disintegrated. Bought some cheap vinyl pads from China to try out, but they made them sound like dark mush, with horrible bass. I decided to try drilling holes in the grill, but ended up cracking the grill instead, making them useless. Not only that with the pads it didn't help with the sound anyways.
Since I didn't want to have the drivers to be unprotected, I ended up buying 50mm speaker steel mesh grills e.g. (https://www.ebay.com/itm/2-Pcs-50mm...tective-Cover-Decorative-Circle-/223026361493). After gluing them on with a hot glue gun, they surprisingly sound decent without any pads. I think it's because they make the headphones sit further from the ear by .5 cm, it tames the treble despite not having the original grills anymore. The bass is pretty tight, and the headphones themselves sound pretty laid back and nice.
Perhaps this may work better for some instead of doing a kramer-mod or cutting a hole in the foams.
Edit: As some may know, if you take off the grills, the treble becomes unnaturally high/harsh and brittle. Some like to drill more holes into the grills to let out more treble, e.g. the kramer-mod.
Anyways after putting on these mess grils, the treble becomes natural again, rolling off naturally. After having listened for a few hours to all sorts of music whether classical, jazz, acoustic guitar, electronic, instruments sound natural, and best of all these phones have really become non-fatiguing, and you can listen to them for hours without having to take a rest.
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You really should have called Koss. Their products have a lifetime warranty. Others have posted about how Koss with a very few exceptions supports and repairs all of their products free of charge. I dropped my Porta Pro's and one of the speakers detached itself. I ordered a new set and when they arrived I read what it says on the box. I called Koss and was told to send the broken one in for free repair. They'll be traveling via UPS on Monday.

That's basically how I'd describe the M40s and to a lesser extent, the M50s. The M40s sound better to me than the M50 or the M50x.
Put me in for the AKG K240s.
I bought these based on an AKer's review and they sound excellent:
https://www.newark.com/stellar-labs/ho-5960/full-size-dj-headphones/dp/52W8580
They are cheap, ($18.19 + ship) cheapest I have seen them yet right now.
I have posted about them before but no one seems to be willing to believe that they can be good for that price.
I have JBL L300 and when I say that these headphones sound good, you should know that they really, really sound good.
What is it about this hobby that makes more expensive sound better than less expensive no matter what to some of us?