Well I found the 90 degree SATA power connectors over at molex.com but I am unable to find a reseller. I've tried Jameco and Mouser with no luck. Anyone know a online vendor?
Did you find the Molex part number? If so, enter it into the search page and the product will come up on the results page. Click the "Buy" link and then select your region and it will give you a list of distributors of that exact part, and quanitity available.
If you don't find anything, A.C. Ryan is another manufacturer of these parts, and you could e-mail them for availability of the parts:
Looks like the link I posted above was for a session. The molex part numbers are 67926-0011, 0012, 0015. This is a newer style that has a latch to lock it in.