Unfortunately, we are not able to assign an IP from outside of our allocated ranges. If you're finding specific IPs are being blocked in those countries, you can try recreating the droplet to pick up a new one. The system will actually try to retain the IP for you, so create the new one before destroying the old one to ensure you get a new IP. There are different IP ranges in each of the datacenters so you can also try transferring to another region.