F21W single use motors put on production hold.

From the Aerotech website 11/14/05:
AeroTech's 24mm F21W single-use Econojet motors have been placed on production hold. AeroTech has been unable to obtain phenolic casing of sufficient quality and quantity to continue manufacturing them using the current design. As a result, F21Ws have been removed from all current in-house orders.
AeroTech has designed casing and bulkhead molds similar to those used to manufacture the 29mm standard and Econojet motors, which could be used to create parts for future F21W production. The time frame for implementation of the new design is uncertain. AeroTech will notify its customers if and when the F21Ws are re-released.
AeroTech apologizes for any inconvenience this has caused its customers.