You will have to choose a JAA/NAA to submit the license to.Maybe Scandinavia or France.
Anyone but the CAA/UK would do, as they are out to make it most difficult and expensive.
It would be interesting to find out the various charges by the different NAA's.
If anyone has done the research into this I'm sure we would all welcome that info.I know that UK licensed guys certainly would as it is averaging about ukp1800 to convert a UK license with types!!!!
So come on, someone please contribute if you have looked into it.