Can't Buy a Replacement XF250 Now??

This is frustrating. I have 2 XF250's and the Advance Controller. One of them just quit working at 18 months old. No longer under warranty, BUT I also can't buy a replacement anywhere as it has been discontinued?? Also the new pumps won't work with the 200 controller?? So basically I threw away about $500.. This is total BS in my opinion. Are there really no options other than tossing the one that works and the controller and buying a new kit? With being left alienated I don't see that happening.... Thanks for anyone who may have any info to help!