Fretsonthenet.com sells a reproduction pickup ring for the T-20. There was a guy on eBay selling 3D printed knobs that could be painted to look right and were cheaper than the originals that people are pulling off and selling. So aesthetically you could make it look right for not much money. I had one and wish I still did. They are excellent players but if they haven’t appreciated much in 40 years they probably never will.