yep, i bought mine from DSE back when they werent trying hard to be like harvey norman etc...
however, if you cant find them in jaycar, you can find them in your local hobby store aswell.

now you just need a digital SLR, toy railway track, green screen, play-doh, some digital editing software and some...nah just kidding with you mate.

good luck with your project and send us a link when you're done.