How about sleeves for the clamps to be able to use other sizes of fork tubes in your triple clamps?
Simple slotted clamp sleeves with a top shoulder to keep them from dropping out would be easy to machine in any inner I.D. with an O.D. of your custom clamps.
That would allow us to source many front ends that are available.
Those sleeves would be a great addition to your parts kit availability.
And don't some USD forks have a different size top & bottom clamp?
Having the various sleeve sizes would really open up the fork choices and you would only need one triple clamp size.
Using the Suzuki DRZ front end is great for parts interchange but there are many good choices on eBay from other bikes.