Yeah, I really like them. They came with some Vacors and what I have worked out are probably Imperial. Seem like Vacor colours and patterns but I can't find anything with this combination.
Im assuming they may have come via House of Marbles, as I'm in the UK. I remembered to ask the seller background, but all he could remember was that him and his friends were into marbles at the time and he was given them for his birthday, I don't know how long ago though.