I'm pretty sure (but not positive) you can still get these new from MGW, but you have to email and ask about them, they don't list them on their website. MGW LTD., INC.
yeah gripper is $60.00 the other one is $44.00. i called today lady said it does not look like the stock knob it's engraved on them.... i checked craigs list and e-bay = NADA. good luck
Powershift's looks real stock. Lines between numbers on Nerdkillers look a little wide. Is Nerdkillers a GG&G? I would pay good money for a real GG&G one for sure.