While you can use other DIN Adapters, your rebuild kits an filters are likely not to be compatible with the replacement parts in your rebuild kit going forward. The parts, from Hog, are:
B-01-002-03-BK DIN Wheel
C-01-002-14 DIN Housing
C-01-002-15-PT DIN Housing (2)
I'm assuming your O-Rings and sintered filter are all still useable. Most don't keep them in stock, but I am sure I can have it to you by Saturday or Monday, even If I have to pull one of an existing reg!!!
Give me a shout if you decide you need one!