Sorry I don't have one. I have an older 16' that has the A/C in the back, so my shelf placement would be different. Besides, I only made mine on one side so I would still have some hanging space.
The pattern really isn't that hard to make -- honestly. Get some brown shipping paper (acutally you could use newspaper if you don't mind getting a little ink on your hands). Cut a piece larger than you need. Take a piece of masking tape and tape it to the wall where you want the shelf to be. Make sure it is level. Once it is level, then take straight pins and start pinning the paper to the carpet, folding the edges up to hold the pins and allow the paper to make the curves. Once you have it just like you want it, take a pencil and mark around the crease. Once you have this done, you will have your pattern.
If you want to double check yourself, take a piece of cardboard (poster board is good) cut it off of your pattern, then check the fit. Much easier to add pieces to the poster board than wood. Just keep working with it and you have the perfect pattern. No need to recut the cardboard each time you want to make an adjustment, just tape another piece on and trim.
Really, it isn't hard. It just sounds like it.
16 ft Spirit Deluxe