I think most any bearing supply house could help you - just google "houston bearing supply". The issue may be to find out what bearings you need. If you know the axle manufacturer and have a model number for the axle, the manufacturer can probably give you the bearing sizes and maybe some part numbers from several manufacturers. If you don't know the axle manufacturer or model number, perhaps Jayco could give that to you and you could go from there.
There's lots of advice and information in forums... sometimes it is correct. For example, all of my posts are made by a political appointee who got the job as a reward for contributions to my diesel bill.
2011 Jayco 28.5RLS; 2008 Chevy Duramax; Pullrite Superglide Hitch