I'm new to this forum so forgive me if someone else has already asked, I have not read the 18K articles. I recently purchased a Great Planes Big Stick from a guy at my flying club and I am in the process of stripping all of the old monocoat off. I noticed that this plane has plastic wingtips and one of them is pretty badly cracked. I want to replace it. Checked Great Planes web for parts but they just want to sell the whole wing core. Any ideas where I can get a couple of these?