So then I guess you're an owner. If it's of any consolation, I've been using a pre-amp for the past two years that's not exactly a thing of beauty but I did have advantage of seeing it first so I knew the face plate had chipped paint, and the cover was scratched and dented. I also knew it did not work but I took a chance anyway because the price was attractive. Internally, it too needed more work than anticipated - a new power switch and headphone jack.
Supposedly it did duty in a studio of some kind. There were many repairs made internally and overall it was not what you'd call handled with care. Face plates are available but I decided against getting one. Cost was a factor at first but then I started to appreciate that it had to work hard all it's life so it looks how it looks. The physical appearance bears out it's history. Like I said - battle scars.
FWIW, and I know this will likely get contradicted, but I have it on good authority there is no benefit to buying high end, boutique, "audio grade" capacitors for things like this. I had the benefit of corresponding with someone who oversaw the production of the very pre-amp I was overhauling. He explained that good quality general purpose capacitors (ie: Panasonic and Nichicon) are all that is needed. I bought mine locally (there were 41 in total) and got mostly Rubycon's. Cost for all was about $15.
EDIT: Caps for your 3020 would cost more because there are bigger ones inside than what I was contending with.
