Check one of the gold sponsors on this site. They have plenty of selection. Or, you can do like I am, search every bar in town, see if they still use their dish, and if they don't use it anymore, get the parts!
Is this a fixed dish or will you motorize? What satellite will you be aiming at? Are you wanting to receive C-Band and KU-Band? Does your receiver support LNBFs only or LNB with polarotor?