Yes, that part is close to $100 up here in Canada and if you need two, well that's $200, and again just for the part. Stupid rip-off dealer parts counters up here! :nothappy:
BTW, I'm still talking about the 2 rollers and replacing THEM with a bearing, not the lower bearing wheel, that is fine and not what we're talking about.
For me, this is not just about $, but solving a problem the right way. Discussion can be had about OEM being the "right" way, however clearly the OEM part with the plastic rollers does not last more than a few years, certainly not going to last the life of the van.
Plastic rollers/spacers from Lowes is the lowest cost option, but essentially gives you the same solution as the OEM part.
So far, BSQ's idea of the brass roller is the only one that will outlast the OEM design, my comments above are just around at what expense. Rollers will definately last longer, rail will likely not wear any faster (maybe a little), will there be more noise in say 6 months of use? Will the pin holding the brass roller wear out when the grease is displaced in weeks/months/years? etc....
As for the bearing idea... to me this seems to be the longest lasting with lowest consequences, however may be expensive to purchase. I think those bearings can be close to $8 each, need 2 per bracket + S&H.
For me, I've ordered new OEM brackets from a dealer in USA, 2 brackets and shipping to Canada is like $80. When I get them and change them, I may see about putting bearings on the old brackets for the next replacement job, which at this rate will be in 2-3 years from now.
Cheers...
D