A long shot.
In Marsh Harbor, on the road out to the airport
, maybe a mile up the road from the town, is an auto repair shop on the left hand side, that really helped me out with a similar problem.
Off course, this was pre-hurricane Dorian times, so not sure if they are still around.
I was advised about this place by a local taxi driver. When you get to Marsh Harbor, ask any taxi driver as they will know all the repair shops.