First off congrats. on nice rifle buy.
Unfortunately you will not find an aftermarket stock for it(not new anyway) they just aren't made. That said you could always turn it into a blind mag with no problems or go total custom build if the stock builder has the program for side button( I doubt it).
As for barrels try Northland shooting Supply or one of the other vendors here on the site they usually have some barrels in stock, if not Brunno's always has barrel blanks for sale.
Good Luck.
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