I have not had success finding the exact roller/bearing TS used on my coach, but I have been able to make my own roller/bearing assembly. I purchased tubing of the correct OD as the OEM roller and bearing OD and the proper bearing ID and assembled them using Loctite bearing Retaining Compound. This will give you a roller of approx. 3 times the thickness of the OEM crimped end roller/bearing assy. Currently in FL and materials at home, so can't give exact purchase info. PM me in May if you need the info. or do your own research. Tubing came from
https://www.onlinemetals.com/
and do not remember the bearing supplier. Hope this helps someone.