I also lost my flippy Comet recently. All I have left are heavy, stable Z Comets... do I try to break one in?? I'm thinking yes; but I do like them flippy.
Possible replacements I have are a 150 Star Stingray, a medium weight GL Fuse, a heavy Tangent, a Flying Squirrel.... But it's just not the same as a Comet. I might dig up a Stratus and see how those fly nowadays.