For the injectors: If you capped the inlets and avoided any shocks to the delicate needle in the other end, there is not much more you can really do to "clean" them without risking dirt entering. Hopefully you also stored the injector lines in a way to avoid foreign material from entering.
Reusing injector heat shields: There is a way to reform them, with a 1/2" or 3/8" ball bearing, an appropriately sized socket, and a vise. The idea is to squeeze it back into the original shape, judging alongside a new one. Inspect for any cracking along the circumference of the inner hole.
Red Arrow, please share where you are getting heat shields for $2.
Helpful link for refurbishing injectors:
http://vincewaldon.com/index.php?opt...d=20&Itemid=28