i got mine from my mothers garage :roll: , but im sure wok is right, most hardware stores should have them.
Alan, i just marked it all out with a vivid, i used 3 dots for each peace to line up, it was a bit messy, sliding silicon all about but got it in the end, then used one of the 90o clamps to hold in place.
i will try to get some pics of the lids, and the mod's i made for the airline