Shirley, there is an item that people use to fill water beds that looks to me to be very, very similar to a python, but doesn't have the siphon tube on the end. It is a fraction of the cost of a python and would probably do the job for you. If I was looking for something like that I would definitely get the water bed filler and then look around for a siphon tube that would fit on the end.
Len
Len