The original spars made for QAC came from two sources. One was Larry Howell of Dallas, TX and the other was a Californian company. Ref: Q-Talk #87.
Replacement spars for both the Quickie and Q-200 have also been made by Composite Creations in Australia via the very experienced Peter Harris, using a mandrel specifically made for the job. I followed your link and apparently they are still available.
Since this is a critical component for the safety of the aircraft, they should not be made in China.