swiss parts fit each other. There is too much variance between the asian 7750 and swiss. The tough part is finding the dial and date wheel. I went through the same thing. They are out there. In fact, I have a date wheel I can sell you from Leo. These are not quick projects, but once you hold a modified one in your hand it is very satisfying. The functional date pusher was worth it to me.
I have a franken 250 that has a genuine dial, hands and crown, so I can tell you that they are out there....
If you do not want to go through the hassle, Francisco has modded the date wheel to raise it in the window but you still only have a 7750 and no date pusher, but it will look the part...