Hi Scruffy,
If you fancy a Flying V or a SG type bass I can help you out with a set of plans, or you could go for the headless bass option. If you get an old bass with a decent neck then have the body modified to take the headless bridge, then you chop the necks head off and a little tweaking to have the strings threaded through your new headstock and down to your bridge with built in tuners.
Alright saying all this sounds easy its just a bit fiddly.
The plans I've got are for guitars but can be easily modified to bass guitar, if your interested or have further questions drop me a line.
Cheers ALAN