www.powerpro2000.com (3.5 Isuzu longblock)

www.rpmrons.com (3.5 Isuzu shortblock)

www.car-part.com (clearing house of salvage yards)

Isuzuparts.com, Isuzuparts.net...there are lots of options & these are just a few. Do a forums search for more.

And yes, any 6VE1 should bolt right in (from a Trooper)