You don’t need to restock. It just needs to be refinished.
The lock area is an odd Error, the casted bur obviously needs filing down, that’s an unfortunate error, if you can return the gun you may want to consider that route And exchange for a better one. Again, that;s an unusual mistake.
If you keep the gun, I would do the following
Clean up the lock plate, fill that tiny hold with a mixture of wood glue and walnut saw dust,
the side plate you can peen the edges for a tighter fit.
The thimbles are not very tight, but this is a common mistake, I would coat the inletted area with a slow drying glue with a dark dye or wood dust mixed in.
After stripping down the stock and staining, and I would fill the areas with a 5 min epoxy, waxing the metal parts so they don’t stick.
Smooth over with 220, blend to the surface.
use a a dark walnut dye rather than a stain For the wood until the stock and filled areas are uniform in color.
seal the stock with many coats of permalyn sealer until its hard and shiny.
Workdown the sealer with 320-400 grit paper until the color of the stock is almost a gray color.
Rub down with linseed oil or pure tung oil and your stock should be pretty tight and uniform.
As far as restocking, not worth it. Chances are a precarved stock like from Dunlap, will have some flaws in it that you have to do the same kind of work on.
If you want a perfectly carved stock, You’d want to make that investment right, have a real expert do that work.
there is a good instructional video on midway USA about sealing up stocks, this works great for stocks that have had gaps filled and cracks repaired.
I had an old navy arms bess which I did this to, and the stock was almost like Brand New.