There was a guy in Germany that used to have the counter belts. I checked his eBay store (Black Reel) and he didn't have any.
BTW, I bought a pair of pinch rollers from him and for the most part, they're and exact match to the originals. Unfortunately, the part that isn't right is the brass bearing. For some crazy reason, he had the outside of the bearing made with a couple of raised areas. With the teflon washers he provides, this isn't a problem as far as friction goes (the rollers are always pulled in when in play anyway). The problem with them is that with the extra width of the bearing on the outside, you can't adjust the location of the rollers out far enough to center the tape. Once the roller/tape/capstans make contact, the tape is barely in full contact (the tape will always move toward the point of highest pressure) but completely at the outside edge of the roller contact area. Very bad for the tape edge!
I ended up grinding down the raised spots and now they sound better than the old originals. I gave the guy a hard time about it but I think he figured I didn't know what I was doing.
So, the rubber part of the rollers is really nice but I'd advise anyone who's bought them to have the brass bearing pressed out and either have it altered or replaced. Fixing the bearing is a lot cheaper than replacing your tape collection.