In case your interested in a cheep and easy Bulkhead, DIY style.
get an Otay washing machine box with two valves, $12
get four Sink nuts, 1.25 each
and 4 5/8th neoprene washers. 50¢ each
then you get two bulkheads for under $20
This picture is of my first attempt, with O-rings...but that did not work too well. so I got 5/8 neoprene washers that are about 2' in diameter and they work like a charm.
You will also need a 3/4' drill bit...Price less...
edit...I guess I missed that, keg part, please disregard this post unless you want a bulkhead for a cooler based MTL...sorry