Hi Pablo ! We have the "Munich Repair Shop" here (www.guitars.de), Stefan Zirnbauer is a master luthier, also an authorized Martin Repair Service. Give him a call. You may also try http://www.oldenburger-music-station.de/ , they have a lot to do with vintage Ricks, they surely know a luthier workshop able to help you.
Hi Pablo, I can recommend a very good master luthier, who is not specialised in vintage guitars, but who will be able to help you with anything you like, trust me: http://www.kraushaar-gitarren.de/ Walter´s main interest is building new custom guitars with original designs, but he is a true master of his art and will be able to do any repair or restoration that you are looking for. Beste Grüße, Markus.