For under $30 I'd buy new ones . Purchase two lengths of the proper size tube there's $20 right there.one wrong bend and you'll be doing it over again and then it'll cost you more than the pre-bent ones . I just looked up a valiant w a /6 904 on summit and came up with this. they should have your application.
http://www.summitracing.com/parts/RSD-YTC6706/?rtype=10