Try Richard's Micro Fit.
Go laminated, bed with epoxy, and use cross bolts. I use 1/8 inch wide stainless machine screws. One cross bolt just behind the recoil lug the other between the magazine and trigger. Be sure to leave a 1/16 gap between the tang end and the stock.
Install a nice Pachmayer presentation recoil pad.
Take about 2 1/2 months and cost about $200.
The stock bedding, and finishing is not included. I like Minwax Wipe-On Poly.
With some fitting and barrel channel scraping the .458 metal will fit.