Sorry about the delay getting back, we're in our busy season and not a lot of time for web stuff ...
The coil I used for the 2-stroke conversion was off Ebay, but I searched it again and it looks like they no longer have them available - this link however is from a buddy of mine who used this universal coil on his '89 Marathon (it bears a striking resemblance to mine however the one I got is completely enclosed, magnet and all):
http://cgi.ebay.com/ebaymotors/Emgo-...item45f7ae757b
This coil, BTW is only suitable for the 2-stroke conversion, and as a bonus has a plug wire already attached - As to the HEI, the Accel modules are all over for that $18-24 price online, or a generic equivalent at NAPA is like $26