Here is an update on the igniter situation just in case this might help someone in the future. I went ahead and bought one new igniter and swapped it out to see what happened. I drove around for a month like this and collected data. In which period the headlight with the new igniter did not fail to light a single time, so I was very pleased. The other igniter failed roughly 20% of the time (I would make a tally on a sheet every time the headlights would turn on for a month).
With the problem confirmed, I called TRS. I told them that I knew I was probably out of warranty because it had been over a year since I bought them, but I wanted to see if there was anything they could do to help. Turns out, there is a 5 year warranty on those igniters. TRS was very easy to work with, and got me squared away. The problem has now been solved, and I am back to loving my headlights. I guess with the 5 year warranty it makes the situation much better, but this is definitely something that should be addressed.
Here are the dimensions to the ballast mount if anyone wants them.
View attachment 2181502