They were Merc 0303 clones, would have been a lot more of them sold apparently had the war and breakup of Yugoslavia not happened, IIRC a couple of them were rescued just before the war started, were not great machines.The same goes for the TAZ Dubrava coach. I seem to remember a Scottish operator using them on a London - Scotland service , not sure for how long though.
Also looked and apologies if someone else has mentioned them what about the Van Roojen Odyssee, or the LAG tristar which looked like a competitor to the Optimo