Bottom rollers needed for a MasterView sliding window

brass roller (7/16" dia, sits in 1/2" opening) suspended in a white nylon or teflon matrix (L=1 3/16", W of narrow part 9/32" W of wide part 1/2"), 4 on the bottom with 2 near the leading edge and 2 near the aft edge. Looks similar to part# 87-147 but has brass wheel and is longer.
MasterView Sliding Window, , about 4'-10" tall x 3' wide, dual pained.
Can u find the correct part # for me. I need at least 10