Well I've finally got my variation forms in, and jumping the gun I've put a deposit on a new BRNO BO98. After a fair bit of googling I haven't picked up anything, at least in english anyway.
The dealer says it is a new model, not related to the ZKK or 550 actions. It's built on a full Mauser 98 action made by BRNO. Has anyone heard of them? The dealer says BRNO have now closed down and sold all equipment, so these new ones are pretty thin on the ground, and certainly will get more so. It looks like they haven't really made it into the english speaking world, but they're a 98 so parts etc. aren't an issue. I went for a walnut American stock. He's worked the (single set) trigger, made the safety scope friendly and they're factory screwcut.
I'm pretty stoked as it's my first CF rifle and have done a painful amount of reading on mauser actions and their versions and decided I HAD to have a full '98, with a ZKK coming close second. I went for 243 (FEO and land clearing reasons), but already thinking one day will rebarrel to 7x57 (same length action on this).
If anyone is interested, here is a slovakian link with pictures. And if anyone can read slovakian, a translation (other than a fairly useless online one) would be great