Has anyone seen a 4" speedometer or tachometer?

[Blue70]

I planed on sinking some Auto Meters into my stock Bezel
I bought one of the 2-5/8" gauges and it fits perfectly into the smaller openings,
but the larger two holes are 4" I dont believe I'll have enough material to open up
the holes to fit a 5" speedo and tach and I'm not to sure about using the 3-3/8 gauges..
I am hoping that someone makes a 4" but have not had any luck finding any