Wilsons Sandbox

Heavy Duty rear tube Hello Riders! Does anybody know a manufacturer for Heavy Duty rear tubes?  ... maybe a part nr.  I got an MSR for the front tire, but apparently they don't make 130/... (forgot the nr) 17" ones in HD.  I know, slime will save the day, but I still prefer the heavy duty tubes.  Can anybody help? Thanks a lot!  Cheers,                         istvan+Eh13