It's all "who you know"
Don't expect to be welcomed with OPEN ARMS with some Turbine time in the B1900. Your best bet to is to get on with a US Operator that needs pilots for contract in Colombia--they are few and far between but it does happen.
I did see a ton of B-1900 (D) models parked in Bogota the other day.
Good luck on the Colombian GF. I have one too and they are "ahhh-sum!"