the usual suspects, chicago, zanotti's or Lakeshore. should be able to get at least 20% off any of those, and if you are buying over $250 worth of stuff you can get free shipping from Lakeshore HD right now.
Don't forget easy adjsutable pushrods, gaskets, and bearings. If you are going to be in the engine might as well do it all at one. I'll you the part numbers in a bit as I have some work to do. I ahve everything to do mine but am yet to tear it apart. You might want some of the specialty tools too. I need to get an inner cam bearing puller/installer, and some other stuff. Maybe we can go in together on these. PM me if interested.