I slapped together a very inexpensive 3/4" copper water pipe mod. the poor man's 'Chuck'. Unless you have to buy a 10' length of pipe (I had some laying around) this will cost about $6 assuming you have a few things laying around.
Other than your atty connector of choice that's about it for the parts, you'll also need a small spring to solder in the end cap.
This is the switch, a 2A one from MadVapes. It has a nice light feel, I hope it holds up.
Push Button Switch -- Black
Doesn't look bad and the no-frills, straight through construction means you'll be getting all your battery has to offer.
If anyone is interested I'll post further instructions.