Nice trekker. I want one but the wife would kill me if I bought another truck. Here is a guy building a trekker, not to factory specs, but he may be able to point you in the right direction for oem style parts for these things. He is installing a 3.4 v6 out of a 4runner. It will be pretty cool when he is done. Yours will be too. You are doing some good work there.
http://toyotaminis.com/forum/showthread.php?t=2033