Here ya go. I’d contact upsideof76 as per the thread here. Also Dave Berman as per the thread may also be worth contacting. As a very happy (and sad) fellow Soliloquy owner, I wish u best of luck. And please let us know I u find a viable place for parts.
https://forum.audiogon.com/discussions/is-soliloquy-out-of-business
https://forum.audiogon.com/discussions/is-soliloquy-out-of-business