OO-GOA is a RC.690A, CN 11173, based in Antwerp but I don't know who owns or flies it. Should not be too difficult to find out.
Other European Commanders are:
D-IHSI RC.695 (95039)
D-IUTA RC.690C (11639)
I-BLFE RC.690A (11204)
I-MAGJ RC.690A (11265)
M-BETS RC.695A (96034)
SE-GSS RC.690C (11613)
SE-IUV RC.690C (11681)
SE-LZU RC.690A (11121)
SE-LZX RC.690B (11367)
VP-BCT RC.695B (96208)
VP-BMZ RC.690D (15033)
You should be able to at least find a few operators online and check where they do their training. Good luck !