I bought a Dellow Automotive (Revesby N.S.W.) bell housing to match the Powerglide to a 1UZ. These are two differing options. One probably a lot cheaper than the other but could be considered more fidley.
I went with the Dellow option and I am happy. It is pretty solid. I never had an original 1UZ bell housing to compare the two but it's a lot heavier than the 350 Chev bell housing (which is only covers 3/4 of the convertor so it should be lighter.)
I posted my thoughts on this bellhousing in this V8 Drivetrain fourm so do a search and you may find it. I can post some pics next week but I can't fit it to the engine as it up on the stand.
Cheers,
Nath