Currently, there doesn't seem to be one.
Procom
http://www.procomengineering.com Has been 4-6 months away from having one for about a year.
Somebody in Canada had some on ebay, but wouldn't answer pointed questions about them actually working on BA/SM.
The problem is apparently the 270 degree (vs. 360) interval.
BTW: I'm on my third Triumph (Gill) igniter too.
The 2nd one lasted about 500 mi.
