You should be able to have a shop make repairs to jacks but you will need to remove them and send or take them to them. RVA has bee out of business for some time.
Mike, RVIA & RVSA Certified Master RV Technician
Amy, Dr Assistant - Roxie & Mei Ling, four legs each
2000 Gulf Stream Scenic Cruiser 350 ISC w/ Banks = 450Hp & 1330# torque
06 Saturn Vue & 06 Chevy Z71 4x4 toads