B&S Powermate generator engine carburetor.

I posted this thread on the "Finding Parts" forum, but this forum may be a better place for this question:
 
I have a Coleman PowerMate generator it has a B&S OHV engine.  The engine model is 115432-0081-01 and the code dates it late 1996.  I need a 715139 carburetor rebuild kit that shows as "No longer available" or is about $90 on the parts sites that supposedly have stock.  Alternatively, is there a replacement carburetor for the P/N 715317?