德国采购需求：石英管、防反射涂层、陶瓷腔、激光反射器、石英载体、石英腔

I'm currently working on an advanced project focusing on high-finesse, ultra-stable cavities for laser stabilization as part of my master's thesis at a university in Berlin. For this, I'm looking for a custom cylindrical spacer with specific dimensions: 10 cm in length and 5 cm in diameter. It should include 4 through-holes and 12 blind-holes. The material required is Corning's ULE7972, which is essential for the performance of my setup. Additionally, I need two one-inch rings made from ULE with an inner diameter of approximately 10mm. If necessary, I can provide detailed technical drawings and CAD files to assist in the production process. I hope you can support me with these components, as they are critical for the success of my project.