There are multiple options - depending on how much you want it to look like an original 32 style rear, 32 style spring mounts, etc.. Regardless of the approach - it will be expensive as there will be a lot of cutting, splicing, aligning and grafting going on (in multiple places).
If you stick with the late 32 - 34 center section, then things will be the MOST easy (and still not easy). You'll need a spacer plate that is made to increase the width of the center section to match the later ones. You'll need to have the Columbia housing cut and grafted to the 32 - 34 passenger side housing. As you'll probably NOT find a late 32 rear, you'll be taking the longer torque tube from the 33-34 and cutting it and the driveshaft to match the shorter 32 length. I'm thinking out loud here, but I believe the now cut/spiced/grafted right axle housing will need to be shorter than the original 32 was - to make up for the adapter plate in the center section. This would seem to be necessary or the axle will be too short.
Joe Longobardi should be able to take care of you - and he manufactures some really nice replacement parts for the Columbia (8620 steel stuff) - that can really improve the strength.
The biggest challenge will be a lot of time (of somebody's) and a lot of money (of yours!). Good luck!
D