CRX HF Engine Replacement Questions

[FritzR]

I'm having an engine replacement done on my 88 crx hf. The mechanics wanted to rebuild the original but could not find a replacement head after 6 weeks. They decided to eat their labor on the attempted rebuild and start fresh with a used JDM motor. They ordered one and it showed up yesterday as a DX motor. They called up the distributor and they said the other one is unavailable.

Can anyone recommend a good JDM motor company?

I notice that a 92 D16B8 CX motor has the exact same specs as the 91 CRX HF. Is this the same motor with more advanced smog odb1? If so would they look identical with all the odb1 parts and fuel injection on the CX motor?

Does anyone have experience with rising sun engines?