I got the Jim Carter harness with the added turn indicator. I think Jim sources them from another vendor who is quite well regarded for their quality. I was quite pleased with the quality and the easy to follow directions.
And for what its worth, Jim Carter himself has been a greater supporter of Stovebolt.com for decades. Jim stands behind his stuff so if for some reason you have issues, his folks will work with you to make it right. He helped us during some rough times and has been a personal friend of mine for years.
I'm not sure but Jim might still be offering a 10 percent discount to Stovebolters.
John