Like you said, no one has a compressor map for it, but I've heard its comparable in size to a GT30, maybe a tad larger.
So, it could be used with a stock block, but to get a decent amount of boost out of it, I'd recommend a built engine and EMS for longevity and durability.
I do think there was an MR2 with one installed. Maybe I can find if it had any dynos done to it.
Edited to add:
Didn't find any dynos handy, but a bunch of references after searching for "ct26/35r" on MR2OC.com
Here's a quote, ".85 a/r turbine with a GT35R compressor wheel. 61mm 56 trim compressor. No, it will not run out of puff"
Also, it supports about 300 whp near 10 psi (therefore the limit of boost on the stock fuel system) and well over 400 whp at more realistic boost levels.
Do a search yourself for more info.