New answers tagged piece-information
Leggodt.nl lists such a brick as part of their collection and also has photos of them. Here is the entry, and on this site you can find a good picture showing the brick and the obscured Pat. pend.: (The entire site is a good source for what does exist.)
I've never tried it, but I suspect you can do this with Rebrickable.com. It lets you upload MOCs, which must have an inventory. It then lets you see how close your collection comes to building that set, including some possible piece substitution (i.e. similar parts, related molds, ignore colour, etc). Finally, it recommends sets to buy to increase your total....
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