I had a good experience with a company out of Sacramento CA called Venus Auto Parts. [ http://www.venus-auto.com/ ] I purchased a JDM TT motor for my Z four years ago that is still going strong on stock internals. I did replace all seals and gaskets along with many upgrades, but I am still on the stock internals on 18psi as a daily. I only paid around $400 for the motor and $200 for a JDM TT 5 speed that is still going strong. Not sure what shipping will run as I was stationed close enough for a local pick up at the time I purchased.