I found a maple one for pretty cheap on E-bay. Figured I'll give that one a shot and if I don't like the wood it comes with, I'll re-engineer it a bit.
I came across your post yesterday looking for a differnt kind of drop down hinge. You have probably resolved your need considering how long ago this was posted, but if you are interested here is the hinge you were looking for. http://www.thehardwarehut.com/catalog-product.php?p_ref=182416
Thanks Dave, that's exactly the kind of hinge I ended up buying.
I actually ended up buying one like that, and another 'kit' that came with shelf off of ebay. I used one in the kitchen, and I liked it so much I put the other one out in the garage, er, shop, to use for holding the latest plan or magazine that I was working from.