Here are a couple I made, thin and thicker. All fit 2 1/6" gauges.
3 gauge panel 2 1/16" by AURktman (thin)
Thick gauge cluster 2 1/16" gauges by AURktman (thick with spots to insert 1/4-20 bolts from behind)
3 gauge panel 2 1/16" by AURktman (thin)
Thick gauge cluster 2 1/16" gauges by AURktman (thick with spots to insert 1/4-20 bolts from behind)