I would suggest a LDC from our very own Rocker1 here on the forum. I’ve got one for my P-rod and Streamline and they are VERY VERY effective and quiet.
https://donnyfl.com/ I would check out one of his adapters and possibly a Sumo or Ronin. Maybe one of his smaller moderators would do the trick also. Give Donny a shout, he’ll set you straight. You won’t be disappointed in my opinion.