Has Dyna ever sold in US?
However, in Japan, you have about 20 different models from 1977 up to today...
With about 15 different engines 2L up to 4.2L (most of them are diesel or turbo diesel).
I've looked on the engines list and I didn't see any model that is commonly used somewhere else (as much as I know)...
Bottom line, either you customize modifications for yourself or you can forget about it...
If you have one, give me the VIN number and I'll see what you have there and will try to find shared parts with common models...
Good luck...