i know some people don't like to buy on ebay butt that's where i get some great electronic things not even available most other places i will put some rf switch links here that ship from the u.s. i have purchased and used many of these switches and other things (over 700 purchases on ebay only 3 returns)read the description some of these allow programing of how the buttons on the remote controls the relays.
6 Channel switch another one
4 Channel switch another one
4 Channels there are many others some with one remote and separate receiver relay circuit boards etc. you may be able to find some of these on amazon also. or how about 12v motion detector switches
12v motion switch
