That's why I say count-as Orks. There's no way that Squats are well represented by a T3 and subject to pinning profile. The Orks profile fits fairly well (T4, I2) apart from slightly high M and low Ld.
I'm with Ardavion. Just use the Squat Necromunda gang rules, divide creds by 10 to get teef, and buy them vehicles to suit. The only complication is that all Miners count as Heavies, so there isn't a convenient way to tie number of vehicles to number of heavies, as there is with most gangs [that is "heavies equal spanners"].
The old Citadel Journal article on importing the one to the other strongly recommends not allowing further access to Necromunda weapons and gear after gang creation, having to make do with ork gear after that. That could work.
Another option would be to mount them all on a mix of bikes and endrinrigger dirigibles, and count them as Muties, with the fancy Mutie tech.