I've been using my Orion a a lot recently and have some guitar gigs coming up this year so will be considering making this a reality.
My simplified requirements are now.
Two str pickups in the neck and bridge positions to replace the HG pickups.
A three way blade switch which selects either both neck pickups, both neck and both bridge, or both bridge.
Then two separate 3 position paddle switches, one for the neck pair and one for the bridge pair, wired such that when any pair are selected by the blade switch, the toggle switch selects between outer, both or inner str pickups. The guitar already has filter electronics and 3 position Q switch and I bought the pickups and extra switches from Mica a while back but do not have the brass plate for mounting the blade switch and I think the control cavity would need extending to cater for that too.
Unless of course someone has a Spectrum guitar for sale or trade.