You might be out of luck on that, hopefully not
and someone pops a few specific part numbers your way sooner than later,
and the separate bits are gathering dust in some dark scary deserted almost forgotten Fluke storage warehouse..
ok, that's a bit of a dream or wishful thinking

but perhaps someone with a 3D printer can knock up those parts, without having to buy the entire Top Case assembly,
assuming 3D printers can whip up the tough plastic required of these moving parts,
and you would need some sort of programmed template..?
FYI I know just beyond zero about 3D printers, only info cobbled from questions asked at the local Jaycar electronics store,
and convinced I won't ever consider buying one,
but I noticed the plastic used looked like rolls of whipper snipper/line trimmer string, which I know first hand is tough stuff,
so I'll take my leave on that there, wishing you best of luck either way
