Yevonne,
The parts for the orginal reel are no longer available as you have found out
But there are other brands of reels out there that may work. They are typically used on service trucks, like what power companies and heavy equipment repair trucks carry.
Here is a link to a thread that deals with it. Salvage is another issue but are going to be hard to find. Best bet would be a call to
Colaw Salvage they are one of the largest RV salvage yards that I know of.
Aaron