Chaplain,
I am the same wanting a remote filter and and to use a thermostat, but the thermostat will have to go inline?
I see Ford motorsport make an alloy filter housing that allows the filter to face towards the front of car, this may accept the sandwich, but I am dubious of to many seals in one place could be a recipe for disaster!
I guess use a blanking at the main
oil gallery, run your pipes to the thermostat/cooler and back through the remote filter.