Australia has the VI- prefix too? Perhaps the CAsA KingAir or whatever they get around in these days could have VI-RUS? Maybe Glen B could grab VI-CTM...
63 available marks you can reserve as of this morning. 17,576 - (16,003 + 63) = 1,510 marks currently "unavailable" for whatever reason, probably already reserved. At least we don't have the scenario they do in the US where
some parasite bulk-reserves groups of short N numbers and tries to flog them back to owners at exorbitant rates...