I never realized the custom's controls where that different. If you've got the money I'd buy a new one from ebay, a few people on here have bought them and they work well. If not, I dont' see why the one's you mention wouldn't work, or you could get some from a deluxe or standard CX.
Something like this:
http://cgi.ebay.com/ebaymotors/NEW-...6722515QQptZMotorcyclesQ5fPartsQ5fAccessories
Something like this:
http://cgi.ebay.com/ebaymotors/NEW-...6722515QQptZMotorcyclesQ5fPartsQ5fAccessories