http://www.fumotovalve.com/ or http://www.quickoildrainvalve.com/ will get ya there. Vendor is in US, ships pretty quick and I've bought like about a dozen since they have ones that work on my heavy equipment. Being able to drain the oil on my Caterpillar D6 without having to drop a 700 pound skid place is handy, especially with 8 gallons of oil! So far the only things that don't have one is the motorcycles and the new VW since I do the oil change from the top on it.

Get the one without the nipple, unless you want to hook a hose to it for draining into something other than a drainpan. The nipple model is mostly for commercial or marine applications.