Thoroughbred Arabian 3 to 6 years gelding

Thoroughbred Arabian 3 to 6 years gelding - I am looking for a 3 to 6 year old thoroughbred Arabian gelding for small to medium distances and dressage. ( if older then he should like to know rider weight). Very gladly gray. The horse stands at the house, has daily pasture (also in winter) and lives in an open stable with another Arabian and a donkey.
Please only in the area of North Rhine-Westphalia.