TRANSLATION: Hello, I raised a request directed to ERLING for a gasket with 86,5mm bore diameter. I'm still waiting for an answer including price, availability and time of delivery. I guess, if they are able to produce a gasket with 86.5mm bore diameter, there should not be any problems to produce a gasket with 87,00 mm bore diameter. Based on the fact, that your location is Australia, COSMETIC is probably a good alternative. I already used one of their gaskets with 86,5mm bore and i know that they are able to make one with 87,00mm bore. Perfekt ist sicher anders aber verständlich sollte das sein