Funk & Grooven member
Gold Supporting Member
I think you could get in the ballgame with an early Boogie (Mark I - IIB) and a non mid-hump OD pedal (FDII in Comp-Cut, etc) for about $1,000. The catch is that to sound like the JB video it's gonna take a LOT of treble and presence to dial out the overly thick mids and bottom of the Boogie. The pedal will help with this but it'll pretty much be on constantly.
I was able to get similar tone with my Mark I reissue running 6V6's and using an FDII. Not perfect, but close enough without spending the $$$ for a Kelley.
I really dig early boogies. But they don't and can't sound like a Kelley. I've tried.