None that I'm aware of, sorry. I've been looking for a while for shorter wood options, and it looks like your only option will be to cut down and refinish a factory length wood stock. Proportions can get weird looking when you do this, though. You don't realize how important the relative sizes of the forend and buttstock are until they are out of whack.
Here's a recent DIY project for reference:
https://www.canadiangunnutz.com/for...10-22-Tanker-a-fun-SBR-build?highlight=tanker