Okay looks like no one wants to play. LOL.
I agree that it is "made or done to order for a particular customer," but do not necessarily agree that it cannot be resold. Now I wasn't a custom lure guy, but more of a custom color guy. If I made a custom color, some guys were very hush hush about it and of course I would only make it for that particular customer. Some guys actually told me that I should add their custom color to my website so ordering it would be much easier for them. In either case, I would always ask for the customer's permission before selling to the public. I imagine, however, when talking about a custom "lure," entirely different story.