Congrats! That sounds like a cool instrument.This year my partner and I a slidable drum type thing, sort of like a drum and trombone combined. It registered all of the pitches quite well and we were able to place 1st at states with it (In MT obviously so maybe not the toughest competition)
You can also start collecting your own samples from old clothes and plastic containers.I think the North Carolina Scioly website has some. They are frequently out of stock though.Are there any online stores where my school can buy plastic and fiber samples?