For a traditional tactical style tactical stock there are a couple of nice options that aren't overly expensive:
The Victor Company Titan 1022
The Magpul X-22 stock:
If you prefer more traditional materials both Boyds makes several styles of laminate stock, and Bell & Carlson offers a selection of synthetic stocks.
McMillan even makes a version of their A5 for the 10/22
If you want an aluminum chassis there are a few smaller shops making them for the 10/22, in addition to PMACA:
PDC Custom
Accurate Rifle Systems
McRees Precision
If instead you prefer something more like an AR-15, Nordic Components also makes a chassis that uses AR handguards, buffer tubes, and pistol grips:
https://nordiccomp.com/categories/ar22-3-piece-stock-kit-for-ruger-1022/ (I have one of these that may be for sale soon, as I've moved the action into a Victor Company stock)
And of course there are plenty of cheaper all plastic options on the market made by companies like archangel.