Electric Upright Bass Database

All I found is on Clevinger's site, where there's a 'history of the EUB':
Here's an excerpt:

In the 1970's, the Blitz Bass, designed by John Dawson of California, appeared. Built in an emergency for an upcoming tour, he told me at a NAMM show. Very few of these instruments were built. Even though several jazz artists recorded and toured with Blitz basses, the bass was not put into production.

Hope this helps.
Maybe Mikael Jannson knows more?