do they make
 

a manifold to adapt a ct26 to the 2jzge?

lol that thing is rated at 300hp. Thefunny part is.. you'll be seeing boost at idle@!
as for a converter the best thing to do is find a flange and have a shop drill and tap a manifold flange and grind the inside down so the flow is good, and use the ct26 flange as a adapter. Or this will work also.
It's a t3 to ct26 adapter.
http://cgi.ebay.com/ebaymotors/CT26-...Q5fAccessories

or this which allows you to have an external wastegate.

http://cgi.ebay.com/ebaymotors/2-5-T...Q5fAccessories
You will probably want this aswell so it blocks the wastegate's valve.
http://cgi.ebay.com/ebaymotors/Toyot...Q5fAccessories

They should. They have one for the 1j.

the factory one is. i had mine bored, has a 60 series trim in it!