ribbon tweeters for genesis 300

Hi. Someone can tell me where can I buy ribbon tweeters for my genesis 300? Thanks.
GAT would be able to help but can be very expensive.

VMPS is the only other make that used those tweeters but not anymore. Still, Brian might be able to steer you in the right direction. If so, let me know.
I'm really interested because I want to make a DIY project. I have the Bohlender Graebener Planar Transducer of a pair of genesis 200 and the crossovers.