TacStar makes a glass filled nylon TD stock with an adjustable M4 style stock. Bit on the heavy side and a wider gap than oem where both halves meet, but otherwise solid.
I was recently looking for a TD stock myself and decided on the Magpul, based mainly on shooting a friends non-TD 10/22 with Magpul stock:
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I am waiting for this Magpul stock to be available
Backpacker takedown