I’m taking delivery of my 2022 BRZ and would like to know how or if the Exhaust tips off the Japanese car that extend to the outer edge of the rear defuser can be bought to replace our North American models short extensions ?

You might be on your own to answer this one. The cars are just rolling out, and slowly.

We're getting ours in about a week, but I did not realize there was an exhaust tip difference on the JDM version.

Just get an axle or catback.