I recently had to give up my car and rely on bicycle to commute. I'm so poor right now that I can't afford to buy parts. In my town we have a bike program called rebike which allows us to be given a bike. I proudly took home a 1973 (according to the guy in the bike shop) Blue Firenze GL 2000. My issue is that the bottom bracket is a little loose, and I know it'll only get worse over time, so today I registered my bike and bought according bottom bracket wrenches. Ideally what I'd like to do is find another Firenze so that I have matching bottom bracket parts in the event that I need them. I know that a lot of these bicycles were made with the same specifications and I'm wondering if any informed cyclist could tell me what makes or models may have the same sized bottom brackets or parts? Any input at all, any, including suggestions, would be of great help to me. Thanks.