Welcome aboard. Fairing pieces are not widely available. If a bike is crashed and goes down on one side, the other side might be in remarkably good condition, but other than that kind of salvage, you take what you can find and repair it (think auto body shop). At least a couple of guys here bought the Chinese copy. One of them wrote about it extensively and how bad it was. I believe he did not end up using it, but I don't remember.
@SupraSabre, care to add something about your experience?
Consider that one of our regular posters owns 8 (yes eight) ST1100s - four are working fine and the remainder are for parts. He has already swapped an engine into one of his working bikes. Parts are slowly becoming extinct and the early bird gets the parts.