I think the youth stock would be the best way to go, I have a TDC walnut youth stock on a scoped BC, height is fine for my cheek weld. That doesn't mean it would fit everyone tho, I've checked several of my H&R stocks, they don't all have the same comb height, even comparing pallet wood stocks of different years they differ in height.
Shortening a full size MC syn stock would mean having to change the recoil pad to fit the smaller butt, but I'm sure it could be done, I just checked one, the ribs for the recoil pad mounting screws are full length on the inside of the stock, you'd just have to drill them out for the wood screws.
Tim