I need ideas for a new grommet and bumper guard. After reading several posts on the board, I tried a LM prestige cap. Does not fit at the throat as the frame is made of thicker material (box construction I believe). Is there a different grommet set I could use? Does anyone have any of these lying around? I started with 6 of these back in college tennis days. I was down to one, but recently picked up two more. Both are in serious need of new grommets. Any help would be very welcome.