Track plates in 80 or 100mm with centering?!

I have a question… last week I had my Keskin KT4 rims made in 8.5/18 front and in 9.5/18 back on it and wanted to make track plates with 80mm or 100mm on it. The good man at Euromaster/Viborg also ordered them but that was not possible because they had no centering. Now my question, are there track plates in 80 or 100mm thickness and centering? What possibilities do I have now? Would you be very grateful. A link to the corresponding sales page would be auc h not bad. mfg