pivot is white color and shoe is blue. Metal tab at top has 3 notches. No other #'s or markings, sorry.

The original pivot lock shoe has the dimensions of 2." high X 1.250" wide X .535" (17/32)thick (see pix), which appears to be closest to pn:15-015. BUT the piece fits tight in the track. Do you recommend going to the 1/2" thick one, perhaps pn:15-046? I will need 20 each.