Does anybody recommend any companies who create custom Joomla templates which are compatible with K2?  Thank you.

If your looking for custom K2 template for inclusion in your existing template try simon @k2Joom.com. He has several there.

Check the blog section here for announcements about templates that are k2 compatiable, there are several listed. With the dev subscription from the larger suppliers  JoomlaBamboo, JoomlaPraise, or GavickPro , and many others, can be rebranded