Nice find! This could very well do it. The link shows them to be out of stock, but I would guess Digi-Key might have them. I will probably save this for Rev.2 on down the road, after I get what I have working.
I don’t think I want to complicate things too much more at this point. Since I am planning on running the defrost cycle every 12-14 hours instead of the factory 24h, that may be all that is needed to keep the coils clear. Lots of testing will need to be done once installed, which is probably going to be a royal pain in the you know what! 
Especially since the freezer side is darn near full!