I'm about to do a twin turbo 2.5 Subaru and 915 gearbox.
In Japan it is uneconomic to register a car more than 4 years old so they are exported or more commonly broken up and sold as parts. Here in Thailand I can buy the engine c/w Suby box for 1200.00 USD with usually 80,000 Km. These are not as common as Toyotas and I need to get the wrecker to special order one for be but no big deal
Makes sense for me to go this route.