I don't know what you have available in your country as far as lock smiths go, but if you have a good one check with him. He may have the VATS key blanks and identify which one you have. There are 15 different values. If you have an ohm meter measure the resistance of the pellet in the key, side to side. Use this chart below to identify which value you have. Find the closest value in the right column. You can also order from any number of places on the web like Eckler's etc. About $15US. Then take the key blank someplace and have it cut to match your original.
1 392
2 523
3 681
4 887
5 1,130
6 1,470
7 1,870
8 2,370
9 3,010
10 3,740
11 4,750
12 6,040
13 7,500
14 9,530
15 11,800
Values are in ohms