Keymod Backup Light

Is anybody making a Keymod (or M-Lok) direct attached backup light similar to this one:

http://princetontec.com/switch-rail

…or do any of the gurus here have the inside scoop on future products that may fit the bill?

What’s wrong with the one you linked to?

I have no personal experience with it, but I’m looking for an option that won’t require a chunk of pic rail. It’s 100% possible it doesn’t exist, but thought I’d put a feeler out there.