i did the same thing in my outback. Went in for a duty c solenoid came out with the AWD rebuilt. i went to the dealer. He said he had to pull the plates and measure them, and order them by size and not make and model. Maybe you need to follow that root.
i see your in the US, maybe give
https://www.subarugenuineparts.com/oe_parts_cat.html a call, ask for Jamie, she may be able to help.
nipper