Ideas for 13" covers on larger wheels?

Background: my Dart wears a nice set of 14" LBP rallys and 205/70s all around. I drive it like a granny when it's not put away for winter, and this setup works very well. But...I have a serious thing for the stock look on these cars, particularly these 13" wheel covers and white stripes (pic stolen from fellow '66 owner and Ohioan "Flashback"):


As much as I dig this, there's a bunch of reasons why I don't actually want to run 13" wheels on this car, such as going back to SBP, current and future availability of tires, etc. I've been searching for a way to make this work with 14"s, but nothing has panned out so far. The closest I've found was this guy, who cut up some 14" rims and welded them to 15"s to fit his 14" covers. I asked one custom wheel builder about doing something similar, and apparently the 13" rims/hoops/whatever you call them are too different from everything else for it to be practical. Has anyone seen or heard of anything like this being done successfully?