Alatamont, Eagle and several other makers make boot grips with finger grooves or shallow grooves.

Short of a custom made set, buy one of these and alter them.
Since many of these boot grips are made of phenolic impregnated wood Micarta, it's easy to just sand off the finger grooves, sand with finer sand paper, then polish them to the gloss you like with a metal polish.

Smith & Wesson K/L Frame Round Butt Revolver Grips | Altamont Company

Secret Service S&W K/ L Frame Round Butt Revolver Grips - Eagle Grips, Inc. - The World's Finest Handgun Grips

K / L / X-Frame Round Boot Grip — Badger Custom Grips

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They have non-finger groove grips that are close to boot type.

All Products | Handgun Grips
VZ grips are excellent for a good durable, "grippy texture.
Again, the finger grooves can be filed and sanded off.