Welcome to GH! Good thing you've already checked out some stuff. If I may recommend an alternative to a Filco it would be a KUL ES-87 which can be found
here for much cheaper than a Filco.
I personally have one with MX Reds and I love it. Check out some of the reviews online between the two and many of them will say that the KUL is superior. Super sturdy and nice functions, and they are also selling replaceable top pieces for the housing in 3 colors (red, blue, and white) which can also be found on elitekeyboards or on amazon.
If you have any questions feel free to hit me up! Good luck and happy hunting.