Thank goodness for ability to post feedback. I have the same G6600 part I'm hoping to replace, with near-exact part to save on install hassle.
Two photos attached:
1. Photos of 3 version of G6600 that I have
2. Measurements, based on above graphic. You'll see in red/maroon, that "outside" side is 1/8" taller, due to an extra 1/8" x 5/8"w "nub" of plastic.
Happy to send you the broken piece(s) for comparison.
Bonus Question + Photo: I'm wondering, don't you show these upside-down for install, as the extra piece (shown) gives the bottom more support? (All my kitchen drawer sockets were installed as shown, but I was wondering, since many were breaking, after about 8-10 years of use -- not our use, as we just moved in 1 month ago)