I dont think, without GTS, with the standard configuration, this can be achieved. You have to try with any of the following exits,
- USEREXIT_READ_DOCUMENT in the program MV45AFZZ
- USEREXIT_CHECK_VBAK in the program MV45AFZB
where you can validate VBPA table for the field LAND1 and hardcode those countries which you dont want sales to happen.
G. Lakshmipathi