Looks to me like they were never imported. In 2003 they were supposed to start using Century Arms International to import them, starting in summer of 2004.

As of another thread in 2008, they had not been imported by then. It looks like they never got imported at all.

Someone on another thread in 2005 suggested that it is probably a Bulgarian version of the Russian OTs-01 Kobalt revolver, which is not a particularly great gun.

That's about all I can find. Arcus's website is awful, but you could probably send them an email and find out rather quickly whether they were ever imported into the US. So if you are really interested, that's probably the best thing you can do.