i dont know if i can help you with the prop, but for the weights you can jusy use something you have laying around like fishing weights, smaller nuts and bolds, you could cut up a tire weight from a car, etc. what ever you can think of. with the prop, you could try to find something that you could make work or look on ebay, although i am assuming that you are looking for a substitute. if i find anything you could use as a substitute, il let you know. you could try making one. you could always go ask someone at a hobby shop it they have ideas.