I've got one Revell Lanc, and one each of the new Airfix kits. I've been thinking the same thing ! What to do.....maybe a RW RCAF SAR bird ? Or one of my stretched and flattened fantasies.....

RW RCAF SAR bird is one of the options in one of the Hasegawa kits I have

That's Four Hasegawa Lancaster's, Two Revell Lancaster's and Five of the new Airfix Lancaster's. I also have one of the Old Airfix Lancaster's that I intend to improve a bit with etched brass, vac-form canopy and the like. The rest of the older Lancaster's have mostly gone into the Mk XL in one form or other.
Maybe I should think of other operators, Egypt, Pakistan and Argentina.
Gondor