We do have the blue half filters in stock. As for the red and amber we do have some filters which are slightly larger than half. I'm not sure what they are called, but I think they were used in the Jetstrobe possibly?
As for the domes we have the center domes either new or used, used lower filters in clear, and rotator filters in red/amber/blue minus hardware. PM us directly or email us to work out pricing. firstname.lastname@example.org