Believe I've blown the head gasket after a radiator failure in the weekend

Wondering about the best replacement engine. Ideally don't want to muck around with ECU and wiring so what I'm wondering is:
Are all 3S-FE's the same engine mount wise etc..?
Will a 3SFE from another model (Curren etc...) work on the corona ECU?
Wiring the same?
What is the newest version of the engine available which will work on the '94 ECU and current wiring?
Anyone got one for sale?

Any thoughts, feedback or experience appreciated. Likely to be a home job ideally and as daily driver rather go for the easiest route.