Every Aussie Falcon since 1961 to 1967 had US style oil pans. There were only around 270 000 six cylinder Falcons made then, and a small fraction remain.
I have a collection of 200 crank pans, but one is for my 66 Falcon engine.
The one time invetment of a big press for a sump makes it uneconomic unless you pressing out a few hundred a year, so your stuff seraching car yards for old excahnge pieces. The way some charge, the economics may improve a little if your making them.
The best bet is to do what High Energy In Australia do. Grab a stock pan on exchange, and have a specialist weld in a new section. All import pans from Australia incorporate a '155 bucks on exchange' price deal, which is simply very hard to do when your in the US, and they are in Australia.
The best option is making a domestic cut and shut job fitting the bigger Mustang V8 style baffles to the stock existing US 200 setting. There is a lot of space in the Mustang and Falcon bay in the front and the cross memeber area. I remember seeing Briggs and Straton fuel tanks being welded in with lots of sucess. The baffles and windage trays could be cut economically and added into the stock sumps.