Dellow have this adapter in their catalog. CRS may make it as well. Do a search on this site with either of these names and you should find lots of info. One word of caution, your W58 box isn't the most robust tranny out there, and there's a good reason Toyota put the 6spd Getrag behind the 2JZ-GTE, instead of the W58.
The 1UZ motor produces more torque at low RPM than the 2JZ-GTE, so with the W58 you may have some problems with 1st & 2nd gear synchros, etc.
John