Dave/FFR should pony up to the customers and do it as soon as they can. He's admitted it's a safety issue and needs to get it resolved for his customers. Then he can go after Bilstein if he thinks he has cause to do so.
When Ford does a recall for wiper motors they don't have the customers go to thier supplier and try to make a deal on an upgrade. They fix the damn cars and work it out with the vendor on the back side like they should.
Oops there's that common sense thing again.