7,
For the 240 VAC relay I just used a spare EasyTouch relay that I already had. Just mounted it inside the Spa and ran the low voltage coil wire back to the ET.
For the temp probe relay, I used a Pentair 2-speed pump relay, but again only because I had it for another project that I never did do.. Any cheap Single Pole Double Throw (SPDT) relay with a 24 VDC coil will work just fine for the temp probe relay. You would just need to find some place to mount it in your IntelliCenter.
To follow up on what JamesW said above.. I have the Pool and Spa EasyTouch... But, because I do not have an in-ground spa, changing to the spa mode has little effect on my overall operation.. The pool pump still runs, the skimmers still skim, etc. For all practical purposes the pool itself does not know the ET is in the spa mode.
Thanks,
Jim R.