Anyone build speedo mounts? Need a solo/center mount for 78 GS550

Looking for a single mount/center mount bracket for a 78 gs550 cafe project. I have clip ons, so I am trying to mount it to the original triple tree mount for speedo/tach. Anyone make them or know where I can find one. The tach is 61mm. Not sure what the measurements of the original speedo/tach mounts are.

Any help would be much appreciated!

I don't have an off the shelf solution for your question, but I built my own rubber isolated mounting brackets and have a video of how I did it. Perhaps you might find it useful in designing your own mount bracket and you could build your own. Sounds like a fun project to me.

https://www.youtube.com/watch?v=N_7EE_pK-9U&t=2s