I highly recommend that you get it from here -
http://www.pitbullsupinsmoke.com/barbecue-store.html
Only as a last restort, here -
http://mabbqa.com/zencart/index.php?main_page=product_info&cPath=9&products_id=24
I have the much more affordable Pitbull version and it works like a champ.
if you wanted to link the mabbqa store you should link the 5 ml injector for 29,
http://mabbqa.com/zencart/index.php?main_page=product_info&cPath=9&products_id=25