[400TT]

Snake Bite manufacture an adaptor to bolt 6-bolt moto-lita wheels to standard autotechnica, momo etc bosses.

Are you just after the horn badge or a complete horn mechanism. I know the 9 bolt wheels have functioning horns, but not sure about 6 bolt wheels.

Don at Snake Bite seems to be the expert when it comes to fitting moto-lita wheels. Might be worth a phone call.

Let us know what you find out.