Being outside the US shouldn't necessarily stop you from looking into getting it here.
I've dealth with Mancini's before...excellent outfit in Pennsylvania.
They do the 6VE1 engine (3.5 liter)...I just called....it's $3500 plus $250 deposit for the old engine.
Right now they have 4 ready but they are sold....it would take 3 to 4 working days to get you the motor.
While the price is rather high....the guarantee is good....comes with 3 year 72, 000 mile.