90,000 inspection

Before Christmas I had my Stinger GT for a 90,000 inspection at a free workshop. This then told me that they could not adjust the valve play (which is specified at 90tkm) at the Stinger, which probably lacks a special tool. Since it is a free workshop and the Stinger is now not a common vehicle OK. I then got in contact with all KIA dealers near me. They all told me The same “Joa, we don’t have that here either”. Of course I bought the Stinger used and can’t go to the dealer where the Stinger was bought at that time (which is at the other end of the Republic). Now my question, does anyone in the area Paderborn have any idea who could do it or is there somewhere a list of the dealers who are qualified for the Stinger? Unfortunately, the dealers could not give me any information.