The second seller, the one with the zippy switch, also carries the Happs buttons. The price for the Happs is the same as the other seller. If you need any joysticks, or other stuff, you can get it all with free shipping. Thanks for pointing this out, I think I will buy some. It is a little more expensive than therealbobroberts, but I can use Paypal.
By the way, the zippy switches are from Betson-Imperial. I've seen the name a few times on these boards, but I have no idea how good their buttons are.
Paul