Bonnie, welcome to iRV2.com. We are glad to have you join us. Sorry to hear of the tire problem. I do not know of a local company near you I can recommend but I am sure someone on here does. One source of leak potential are valve extenders if you have them on the inside rear wheels. Almost any tire dealer that installs on larger vehicles can and will work on the RVs. Good luck and keep us posted as to what they find as the problem and correction. Thank you.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr. Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 450 hp & 1330# torque
06 Saturn Vue, 06 Chevy Z71 4x4 & 2014 Corvette Z51 M7