Just left another post elsewhere about a similar topic. Have you tried buying a used top on Craigs list or other web site. Before I found one in perfect shape for 1/2 cost of new, I looked at a lot of others that were like 50-100 bucks after someone had replaced it. Many were in tough shape, but some of them had good parts: frame, latches, windows, etc. Perhaps you could find a trashed one online, buy it for cheap, then just use the window and throw the rest?