Speaking of ebay, this seller has new Prindle Escape mains for very cheap.

http://tinyurl.com/m7etn

The Escape was essentially a P18 with a P16 mast and new sails. The Escape main is going to be a tad bigger than the stock P16 main and you'd still need a jib, but it just might be an interesting project. And the price is certainly right!

jimbo