Paul can find polyethylene round flexible drive belting at Small Parts
Co., I believe it is called.  I am not at home now so I can not consult
their catalog for their address.  Email me for further info and when I
return Sunday I will respond.  They reside in Florida.

I purchased some of the belting and it seems to be real good.  You make
splices by melting the ends with a soldering gun and holding together
for one minute.  Hope that info helps.

Andy LaTorre