Midweek Motorsport is probably the best one. It covers all motor sports but heavily focuses on sports cars as you would expect from Radio LeMans.
Some others:
- Double Stint is done by Sportscar365, it’s not the most in depth but good for weekly roundup type stuff.
- Marshall Pruett does one with Graham Goodwin.
- Over the Limit is done with the Vanthoor brothers, it’s a new one but so far it’s been good.
Dinner with Racers is also a great listen although it’s not dedicated to sports car racing.
I’m sure there are others but those are the ones I regularly listen to.