Finding someone to do the Ampeg headstock could be a hitch.
If you're looking for not quite Ampeg, but tuners pointed backward, (and debatably at least as classy as Ampeg), try try our other friend from Scotland.
In the USA, check out GR Guitars (
http://www.grbasses.com/). Plain, but in a straightforward, effective way, and maybe you could convince them to do an epoxy neck as a special.