The Hellenic CAA have the most friendly interpretation of EASA regulations leading to a cost of around €10K all in for a CPL/IR/ME on ICAO conversion. Two ATOs to talk to are Egnatia and Global Aviation. Egnatia are slightly more expensive (€10K as opposed to €9K last time I looked, but check for yourself) and fly Diamonds, Global use the Duchess.
Diamond in Sweden are very well spoken of, I have no idea what they would charge. As commented above Bartolini do not do conversions, they are at full stretch doing full CPL IR courses.