Robert,
I was hoping the pure yellow Don Wimber could be accomplished in one generation, but it looks like your (EY flavum x bess flavum 4N) is the way to go.....
Dodidoki,
Unfortunately, I do not travel on a regular basis to the EU and lack the F&W permits to bring anything over anyway. You might check out Orchid Inn's website. Sam bought a compot or two of our selfing of 'Fox Valley Mint' and grew them in Hawaii; some are near blooming size. I know he has CITES export permits for them so there's no reason he couldn't bring a few pre-ordered before his next trip to the EU. Check out his website for the info.