Any 1" diameter ac threaded barrel would be easy to chop down to create such a thing. Post pics if you get that done, I'd love to see that.
btw, I had an SA17 barrel end in my pocket the other day when I went into a local shop. Told the guys there I had the world's smallest AC barrel in my pocket. When I pulled the tip out, a couple went ape shart and had to try it out.