Another option for you would be to continue to use WCF and transition to REST Service Calls or Kinetic Functions as time allows. WCF is still supported with Kinetic - you just need to register the Service to enable WCF. Search help for WCF - there is a SQL Script you need to modify / run to enable WCF for the Service you need.
Now, that said, WCF is on the way out. You definitely need to allocate some time and convert to REST Calls or rewrite to use a Function.