What type of stud are you looking for? I know of at least 11 cremello's or perlino's in the Netherlands, Belgium, Germany, England and France that will breed to single-dilutes. Only problem is that mostly the owners will raise the studfee or have a private treaty (with possible options on purchasing foal).
Most of them are either warmbloods, partbred wb, partbred arab, quarab, berber!, iberian/PRE/Lusitano/Andulsian (or crosses thereof).
Let me know what you are looking for with respect to type and bloodlines and I'll do some research.