Allow installing kernel-headers matching the firmware?

[WereCatf]

I was just playing around with Ubuntu Mate and wanted to compile a custom kernel-module, but... it appears there are no installable kernel-headers found anywhere that match the firmware installed by rpi-update. Since you're already compiling the firmware, it'd be nice if you'd package the kernel-headers, too, and allow for them to be installed via rpi-update as well.