WTB: Greenhoe Trombone Standard Valve Cap

[ttf_tbonedan2]

I am looking to buy a Greenhoe Standard Valve Cap for my Conn 88HTG. Also does anyone know if Greenhoe makes a heavier cap than the standard one? If so, I am interested in that one. I have used the Lexan for a long time, and recently borrowed a friends standard cap, I believe that it helped focus and solidify my sound. So I am looking for a standard cap, or a heavy one if those exist.