Go to Butcher Packer and order a 3/8" F. D(y)ck (other spelling, the word won't show up otherwise) tube for it.
http://www.butcher-packer.com/index....roducts_id=434
That is where I got mine from.
http://www.butcher-packer.com/index....roducts_id=434
That is where I got mine from.