The BMW leather kit is Part# 72607673861. Max BMW said they have it available but would have been back ordered so i cancelled to avoid delaying other parts. I just took my 3Pro to a local cobbler because the main (#8 plastic) zipper was separating from the bottom. It took him about 2 minutes to pop off the old slider and pop on a new one to fix the problem. I showed him the zipper on the 4 i was wearing and he had no comment on the relative sizes of the zippers, but blamed the failure of the 3Pro zipper on the pull tab i had added to replace the original metal tab that broke off. He said the greater (longer) the leverage applied to the zipper like that, the more torsion will pull in the wrong direction and ruin the operation of it. I did not think to ask if he thought a larger gauge zipper would resist those forces better but will do so when collecting my other items next week. The next thing i'll have him work on is the waist straps on the pants. The zippers have yet to bother me personally, but having these shitty velcro straps fastening the waist of $900 pants has been boggling my mind lately. Never have i felt the need to adjust them, but they don't fasten tight enough to fit well and as they are keep catching on things and pulling loose. Why would crap like that fail if it is never needed or used? Total fail in my book.