Okay, I found your other post, and now have a very rough idea of what you want to do. But you are pretty light on details over there too.
One of the best things you can do is take some pictures so we can see what you have and what you don't have.
The bed rails can probably be sourced separately from either Jayco or popupparts.com. Yes the white poles are likely the shepherd poles. Is all the canvas intact?
The main door is generally suspended from rails on the inner roof with two cables. Do you have the rails in the roof? If the door is missing, that is one piece you will probably have to source specifically but any Jayco door will probably fit.
The best thing to know is that most "parts" are "parts bin" across the line. The woodwork across the line is custom per floor plan, but the parts fit almost every trailer. They also are not brand specific; Jayco will use more than one supplier for many parts, so don't be afraid to try other supplier options.