When East-West was trying to obtain the 737-200 it sent a number of Management Captains to Brunei for training on their 200s, I believe there were problems sourcing aircraft though, the 737-500 then became the aircraft of choice, size and performance/economics put it ahead of the 737-300, in the end the F100 was chosen, the three on the production line ended up being leased to a Canadian Operator.