I ran across these the other day when i ordered a barrel and stock for a 10/22 i just finished putting together. they show to be in stock in standard or threaded for a can.
cool people to deal with. Prices on what i have ordered thru them in the past i felt were reasonable. It is easiest to contact them by email if you have any questions.
threaded http://hi-desertdog.com/index.php?_a=viewProd&productId=230
standard http://hi-desertdog.com/index.php?_a=viewProd&productId=400
They have a kit at Jefferson Gun Center, I think it was for a 30, they also had one for the 19, but I bought that bad boy. Paid $300. Gunbroker.com has a kit for the 19 for 299. I talked to the seller and he said he has two kits.