The one I purchased is found here:
http://www.mameroom.com/webstore/productinfo_UAII.asp
It is currently listing for $450 but it appears they have broken out what use to be in the kit and now you have to also get marquee retainers, and t-molding for an extra $20. But one thing nice is thy are selling the clear plastic marquee which I had to go to a local hardware store and get cut to spec. So looks like things are a little easier but a little more expensive.
DEL QTY ITEM ID DESCRIPTION PRICE
UAIICAB27E Ultimate Arcade II cabinet kit
449.99
UAIIRETAINERS Marquee retainers for the Ultimate Arcade II cabinet
9.99
UAIIMARQUEE Ultimate Arcade II marquee plastic
9.99
UAIITMOLDING T-Molding for the Ultimate Arcade II cabinet
BLACK 9.99
Sub Total 479.96
I had to pay around $120 for shipping so that would bring it to $600. I suppose the ebay option if it is delivered and new condition is not bad option.