The simplest way to get a series-parallel switch is to simply use a regular DPDT (six-contact) on-on switch. A Gibson toggle has only three contacts and has three positions, so that's no good. Two-position rotaries do exist, but I'd say they're a bit of an overkill.
When wiring the '62 style, don't forget the two 220k resistors. They're integral to the circuit.
Squier VM Bass VI club member #19