There was a converted set of hubs on the car I donated to the beefy fund. Unfortunatly I have yet to find a suitable donor to bolt them back onto, but not for the lack of trying.

You can also bolt bigger off the shelf rims onto the 5 stud hubs as there are loads of merc rims to choose from, the only limiting factor is the tinny arches sierra have been blessed with that don't really allow fitment of anything bigger than 17's with major arseing about with hammers and bodywork

I may be tempted to part with them but seeing as no one else will provide me with a 3.14:1 ratio diff I'd rather keep it for the forswear le future