Bob, I got the pdf, on power gear from their web site , and went trough it ( 111 pages to large to post) only the rollers in the drive mechanism are covered.
So the rollers your dealing with; ( slide to floor ? ) may have been Gulf Stream supplied and installed.
I downloaded the info when helping a friend with a broken drive on his, 2001, 5er slide.
If you think the info would be of any use to you , or if you would like to have it for reference , PM me your e mail address, and I'll pass it along.
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.