I'd love to see some new, classic sized concert toms from Ludwig! But those are an uphill battle themselves. There's just not a renewed demand for them, because everyone thinks they know what concert toms sound like, and that's not what they want. Of course, they only know that '70s padded, dry sound, and won't give them a second chance. That's another discussion for another thread.
Ludwig never stopped making them, and most companies still offer them in their concert percussion lines (which is where the name comes from... not rock concerts.) If they did re-introduce them for kits, it would probably be the Keystone, or more likely Classic Maple. Legacy would be cool, but they don't make 6 or 8" Legacy toms (can't put the rings in them in those sizes.)
Signet toms would be really easy to convert on your own though, just remove the bottom heads, pull the lugs out, and voila! Sizes are 8/10/12 rack, and 14 & 16 floor. Not a whole set, but close enough!
Bermuda