Maybe a Quilted Maple Stock ?
A few years back a member on another forum ran accross a #1 in a Maple stock. He thought it might be a replacement but wasn't sure.
His call to Ruger C/Service brought a response that none of the off the line #1's, with wood stocks were ever offered with anything other than Walnut stocks. Some AmWalnut, some imported Walnut.
They threw in a comment that the comment doen't include the possibility of one of the many special distributor editions or special order short runs they did on the #1 might be in Maple. There are certainly lots of those around but I'd guess they's be marked to an organization and/or of some special feature or caliber not regularly offered.
If the Ruger red recoil pad doesn't fit right (they are belt sanded while in place on the stock as they are finshed), it's a good sign that it's not a Factory stock.
Does it have a Ruger grip cap? and does it fit perfectly to the wood.
Most all of the outfits that offer pre-carve -you-fit & finish-it stocks offer their wares in maple as well as other woods.
So a restock is certainly possible.
The checkering pattern (does it have any?) should be standard #1 style of the period of mfg. They changed a little here and among the different rifle styles available.
They were cut using power checkering tools (MMC and the like). The checkerers were good,,little or no hand work to follow touching up the job.
Ruger did use Maple on some 10-22's in the early 80's I think it was. They were heavily stained dark reddish brown. Most had beautiful tiger stripe figure in them.
Maple can make a very nice rifle stock, it's great wood to work with.
But to leave it the natural blond color is a turn off IMO. It needs the heavy stain treatment to that dark red/brown color to look good.
JMO of course.