Mares has discontuned parts support for Dacor numbered regs as well as the Enduro, Quantum, Fury and other older Dacor regs.
Assuming you found a DIN kit for a 950, you'd be throwing good money after bad as service parts are drying up and no third party supplier has stepped forward to provide any other service options. It is sad to say as the 950 is an excellent first stage, but your best bet would be buying another reg.
Personally, I'd avoid buying either a Dacor or Mares reg, given the way Mares has treated its customers. Both Scubapro and Aqualung have long histories of supplying parts and service for their discontinued regs. In SP's case they still still support nearly every model ever made ince the late 1960's.