help with bikebug fuel pump

[smoothlandings]

I have a bikebug engine that I bought last year(2009), and I'm wondering is there anywhere other than the guy down in Texas who would have parts for a Bikebug?? I think the fuel pump diaphragm went bad. I went to a lawnmower shop and they told me that it was a Green Machine part. Probably off of a weed wacker or a blower. I could send a picture of the part , But if anyone knows where I could buy just the little thin Diaphagm by it's self that would be great. I love my bikebug and it's a lot of FUN!!!