I was wondering where I could find a non drive side crank that is no longer in production. I bought via ebay an FSA Carbon Pro Elite Compact Crank 50/36 (170mm crank length), but I didn't realize at the time it was just the drive side crank. It's probably a 2-3 year old model, but never been used. I contacted FSA directly and they said there wasn't anything they could do since it was a model that they don't produce anymore. I have scoured ebay and craigslist to no avail for the matching non drive side crank, can I substitute another crank in it's place? Or did I just buy an expensive paperweight? Thanks in advance for your help.
I would keep trying to find the left crankarm on eBay. The same way you found the right side you will probably find a left if you look enough. But, really, if you just bought any FSA left 170 crankarm, or any crankarm that fits your bottom bracket, you would probably forget that it didn't match the other one after a few rides. You certainly won't feel any difference. It'll just look different and even then you'll probably only notice if you look at it. I bet few people notice when you ride with them, either. They'll just think you have a truly custom crankset ;-) All that matters is that the arm you use is the same length and that it fits on the bottom bracket correctly. I would think FSA could sell you one that would work. Hopefully it's not some proprietary bottom bracket design that they don't make crankarms for any more. I think they have stuck with a standard for a while and I would hope they could sell you a crankarm to fit your bottom bracket. It won't match your right side but all you need is something the right length and that fits right.