Depends on the serial numbers.
If they are 369M then no chance
If they have a normal civilian serial number then you might be ok. I would guess the engines are the mil version of the C18 ( T 700 I think ), if they are you have no chance. bear in mind one of the first UK mil gazelles was put on the Zwaziland reg used in the Uk for about a week before it was grounded by the CAA !!!
Let me know how you get on. They are rather expensive for a C18 powered machine mind you