They might have made all the materials for the rocket themselves.Or, it could just be a device for plot advancement that you're reading far too much into.
(
JollyJack - a stench from the past,
Tue 19 Jun 2007, 13:20,
archived)
Deus ex machinaTouche
(
AutoPrawn is glad we're living in the future now,
Tue 19 Jun 2007, 13:23,
archived)