Hi Dave,
If you go into any cycle shop and ask for some tube repair glue they will sell you a tube of it for about 5 or 6 bucks.
I repaired a customers Slingshot Fuel leading edge where the stick on valve had come away and rapidly deflated whilst flying out the back of Woodies

. He was lucky to make it back in to the beach before it fell into the water as a bedsheet.
The valve was easy to repair with the glue but getting the LE bladder back in was a bit of a challenge.
A strut will be easy, use either the glue for valves and stuff, or we sell "Tear-Aid" for larger repairs and canopy rips see
http://www.kiteboardingschool.com.au/shop.htm#Tear%20Aid We even have an old bladder laying around of which we can send you pieces for repairs.
Good winds,