Perkins is said to become the sole distributor of the ASP brand for the UK. As it is now, I did not see any announcement on their website, and their engines listed were dissapointingly few.
There will be different distributors in different countries is my guess.
The SC brand, I gather, serves for retailers that don't want to go through a national importer/distributer.
If I understood correctly, JustEngines CAN stock up on SC and SC branded parts, and like back then Magnum and ASP, these parts should be identical and exchangable.
But I would not be surprised if the US will have one, or possibly two distributers as well. As, would I expect, most larger EU countries.