I have five (5) #4 Tyler t-grips for the N-frame......1 glossy black and 4 matte black. They are all either new or as new. I think I installed the glossy one on my M58 and didn't like the feel. I may have done the same on a M28 with one of the matte ones. $25 each shipped, or $105 shipped for all five (the $5 is for flat rate shipping). Add $1 each for Paypal.
Next is a S&W grip adapter in so-so condition. I can't find any markings other than the S&W logo, but it matches the contour of the Tylers, so I'm assuming it's for the N-frame. $10 shipped or $5 if you're buying 1 or more of the Tylers.