Yes. Reico-Titan has a new heavy duty jack out that is being used as oem on some campers now. But I can't remember which campers. At the Neb show thr R-T rep told me that they were designed for 5000#, tested at 3500# and rated for 2500#. They looked very sturdy.
2001 Silverado 3500 DRW CC LB 6.0
1993 Lance Squire Lite 150 (8'6")
2001 Fleetwood Caribou 11J (11'6")