Saw an advertisement of TBC in Bass Player about 6 years ago, that's the only thing I ever saw or heard of them. It was a very sleek bass with design elements of a Jazz Bass, with a dark wooden 'pickguard' covering most of the face of the body. Looked very interesting. It had two J-style pickups and all I could gather was that it was made in China for an American company that sold them online through their own eBay store. It was very affordable but looked great for the money.
Edit: I just looked them up, and their site dinstinctly says their instruments are designed and handbuilt in the "USA". That's a surprise
. I thought they only did the final assembly and setup in the USA.
By the way, are you that guy in Ireland that always has a couple of lefty basses for sale on eBay and leftybass.com?