I do have some legit quality guns but my prejudice for functional peasant guns is something of the Baikal family - which is cheap. I got a couple for around $295-plus and I have three, two 12's and a 20. If you want a straight stock just saw the pistol grip off, sand and file to rough shape being sure to reduce checkering and prepare to make a longer buttpad.
This straight stock shape should be longer than what can be made from a standard Baikal, unless you are short armed, small, or effectively short armed by virtue of being thick-chested front to rear with heavy arms. I will try solid Gabon ebony for my Basikal's butt though it's weight must be considered. A stock thus cut straight would be short but fine for cold weather shooting over garments or warmer weather with a padded shooting jacket. If you want two stock lengths get two guns and chop away. Ken Hurst can recommend people to do checkering as well as the modifications. A temporary close-enough chop job will give you a feel for the fit after which suggestions can be made to a stockman.
Barrels on double trigger Baikals from Remington (or EAA marked before that) apparently are 28" only. That is the first way to go. If you can unscramble your mind and coordination in using double triggers it will be good mental conditioning. It's also a low cost way to start.
