I have LOTS of GSP (and other birddog) embroidered shirts on sale from when I handled the NSTRA clothing.  Lots of Trial specific tshirts with birddog scene on them (not all are gsps).  Tshirts are 7.00 (1/2 price) and other shirts are 20-25. for button down collar shirts (denims too).   Blaze shirts, fleeces in lots of colors.  Best way to find out what I have is call my cell at 423 364 0071, I can walk over and check colors and sizes.  

Here are the 2 GSP embroiderys I have.