no spare parts, and not for beginners

got the part bought at the fair in Friedrichshafen, for 64Steine ​​it took there (at trade fairs always cheaper - ha ha), but a propeller, is already broken by the second short flight test, (Outside in the open air) - and I find nowhere Parts which was for the thing, not the dealer on the side at the fair, there are 4 spare propellers, now 3, when all are I throw that part away ?? not really great :-(