Wanted a body 8 1/4

I am looking for a shop in the Elburn Ill area that will replace the gears in my 8 1/4 rear end. it currently is an open 276. I did some work to the slant 6 and now it has a great bark, but no bite. I am looking for an 8 1/4 open 323 or 355 with a small bolt, or a shop in the Northern IL or southern Wisc area that does the rebuild. Please let me know of any items or referrals. Thanks, Rob S