Copy wavy flag style to other flags

I have some excellent jpeg images of country flags with a wavy effect applied. I have these for most countries that I need but not all, so I am looking for someone who can apply the same effect to plain flags (as sourced from Wikipedia). I am not just looking for a generic wavy flag style - I want something that is very close to the original style that I have (see attached for examples) so that it would be impossible or very difficult to tell the difference. In total I require 9 flags to be converted - Tonga, Vanuatu, Samoa, Macau, Latvia, Lithuania, Estonia, Wales and Malta. If it is possible, I would like the workflow (macro?) so that I can apply the process myself to further flags at a later stage. Attached are some samples of existing flags, (including Libya as it is a single colour so should give an indication of the level of shading variation)