Studebaker International (one of three large Studebaker parts vendors) can supply the shims for the carrier as well as those for the pinion cup adjustment. Will likely take a week or so to get as I ship by the postal service rather than pay for couriers who add brokerage fees to bring stuff across the border.
I picked up this tool some time ago on Amazon. It’s a spreader for Dana 44 type rear ends. I will need it to put the final shims in for the carrier as the width with the shims will be .008 over the space in the differential casting. This is to preload the bearings on either side of the carrier. I read that the housing can be spread apart a max of .020. I will need most of that to slip the carrier in place.