You can start your search here;
LAAS Corporate Jet Aircraft of the World, corpjet manufacturers, bizjets
I see 2 CS Portugal, 4 D Germany, 2 G UK, 2 LX Luxembourg , 2 M Isle of Man, 5 OE Austria, P4 registered Aruba,5 VP-B & VP-Q Bermuda, 9 VP-C Caymans.
The Manx, Aruba, Bermuda, Caymans could be based anywhere.
Some info you can goolge the registrations, also on the LAAS site has the serial number, so you can go to;
Airlinerlist.com all the way to the bottom - Airbus A319 under quick links.
Surveillance | Eurocontrol this site used to list all the operators with their current address - not sure if it's still available or not, you can send them an email and ask for RSVM Approved private Airbus's.