MR16 RGB for lighting?

[FountainMan]

As mentioned earlier I'm redoing my pond and this weekend I'm hooking up a fountain. Anyway I want to light the fountain but like the option of being able to change the colors without manually swapping colored lenses. I found the MR16 RGB with remote on EBay for 6$ a piece which is a good deal. But the problem is the MR16 is .17" too large for the housing it's supposed go into. I've thought about buying the Bi pin sockets some cable and a transformer then housing the light in a sealed PVC housing with clear plastic cover but I'd rather swap a preexisting white LED head with the MR16 RGB. I don't know whether to alter the lighting housing to accommodate the MR16 RGB or to alter the MR16 RGB to accommodate the lighting housing?

Here's what I'm trying to use.

http://www.ebay.com/itm/3W-MR16-Col...005&prg=9700&rk=5&rkt=6&sd=271408247771&rt=nc

Trying to fit into one of these

http://www.ebay.com/itm/160646743607?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649

 

[FountainMan]

Looking for the same effect as my avatar.