93 Buick Regal Custom keyless receiver

Does anyone know where I can get a keyless enry receiver for a 93 Buick Regal Custom. I have burnt out part in the one that I have now.
By the way to program remotes for these you have to short out the wire that is in the trunk next to the antenna. The locks will cycle then you hold down one of the buttons on the remote until the locks cycle again.

Thanks for any help.