I just purchased a filter from TTA site last week or so for $25 shipped. Not sure about the decals value. If you want to send me pics of the decals (if you have them) then please do so at email@example.com. Ebay sells 2 sets ... one for almost $300 and one for $50 ... I'm not sure of the differences between them.
If you want to sell the filter please let me know.