Sumo Aurora Repair

It looks like Sumo is out of business. Does anybody know anyone who repairs Sumo equipment? The Aurora is a tuner.
I happened to find this on the net when looking for some info on Sumo. He says he's the guy that started Sumo:

I don't know anything about him -- just found the site.
Thanks much, Ncarv. I will check it out.
I owned the Sumo Aurora for about 9 years and sold it two years ago. A really nice slimline about 1 and 1/2 inch tall tuner with rack mounts.

Good luck. Sumo's been out of business for probably 6 or 7 years or more.

-John may be a possibility
Thanks all for your responses. I sold the unit to a gentleman in TN, who claims he knows what's wrong with it and can fix it. The tuner actually works, but the preset button don't retain memory. Thanks again for your help.