I just bought some (more) injector seals from O'riley's Auto Parts, i think the part # is 274531 C6G Borg/ Warner, SKU Code- 7 07390 17707 7
I've bought them there before, after going to Auto Zone and Advance Auto Parts, who both wanted approx. $10 per seal kit, O'riley's sells all 4 for just $15.00
The ones Engnbldr supplies with his master rebuild kits were just a little bit the wrong size, so i buy these.
And for injector cleaning, i sent them off to this place...
http://www.rceng.com/Fuel-Injector-Cleaning-P43C0.aspx