I'm using an Ortofon LH-9000 . The price at the regular retailers (Music Direct, etc) is kind of crazy ($250.00). I bought it off ebay for about $120.00 and would recommend the same purchasing route if you decide to buy one.
I never had the original, heavy headshell, so I wanted something heavy to match the weight of the original headshell. Here are the specs on the Ortofon:
Magnesium with carbon fiber build
Weight: 16.8 grams
Mounting distance: 38 mm-46 mm
High purity copper headshell leads (LW-7N) included
According to the interwebz, the original headshell was around 25grams! So I also added Sound-smith steel screws that weight 3.17grams. That gets me to about 20grams I think it sounds great. There are other headshell weights you could buy to get even more weight on it, but I'm happy with it where it is now.
Other folks may be able to recommend other headshells, but my limited understanding is that later Pioneer headshells were not as heavy, so you can't grab one from a later model. But I'm no Pioneer historian, so there may be something else out there that's cheaper that will work.
It all seems to work well together, but if you have the original Pioneer PL-41 headshell, I'd just use that.
Specs from Sound-smith
New! EZ-Mount Cartrdge Mounting screws
» EZ-Mount M2.5 thread screws from Soundsmith
» NO TOOLS needed to mount and secure a cartridge
» EZ-Tweaking
» Now it only takes TWO HANDS to install a phono cartridge!
» Lowers the risk of dropped cartridges & snapped cantilevers
Kit comes with: [weight in grams (x2 screws)]
» 2 Nylon screws [0.52g (1.04g)]
» 2 Aluminum screws [1.03g (2.06g)]
» 2 Stainless screws [3.15g (6.30g)]
» 2 Brass screws [3.07g (6.14g)]
» all 8 thumb screws are 10mm length with two non-magnetic SS nuts, and four
captive thread-on nylon washers
» 10mm thumb screws are easily shortened: install provided nut, cut to length, file flat & remove nut repairs damaged threads!
EDIT : Attached pic of headshell and Zu-bodied Denon 103
View attachment 3483518