Airsoft Stock for Worker Folding Buffer Tube

Hi! I recently got a Worker Folding Buffer Tube, which allows me to attach airsoft stocks onto my Retaliator. Here is a picture of the

dimensions, from the Taobao page. I have also attached additional images of the buffer tube on my Retaliator.

My question is: What is an airsoft stock that fits the buffer tube (look at the dimensions first), is cheap (no more that $30),

and is comfortable (not too long)?

I don't have much experience with airsoft, so I'm asking you guys. Please reply if you find one.

Thanks!