I got my switchbacks from headlightrevolution.com , they are the "GTR Lighting Carbide Series 3156 / 3157 LED Bulbs, C/K Compatible"
I haven't had any problems at all with strobing or any other issues with them. They were pretty expensive, 40$ a set, but I think they were worth it. I'll take a short video and upload it if you're interested. I haven't been too active on here because no one is really paying attention to this thread as far as I can tell.