I ordered some parts from him and asked him a ton of questions (email and phone) when I rebuilt my control valve. His control valve rebuild kit is the only available with hose seats! I couldn't even find some one that stocked the seat for the return line. Also, his seats are made from aluminum like the originals. The tube on my control valve was so out of round that I couldn't remove the bushing. He offered to work it back into shape for almost no money.
If you send him your power steering pump, he will even paint it the correct blue-green color for you.
Randy is a great guy. I highly recommend him for any power steering related work you need. He really knows his stuff and stands by his work.