If you are lucky enough you might get one or two with your
engine. If you have to buy them they are $60 to well over
$100 each. We need at least two for the TLC555 FI and maybe a couple
more for the ignition.

They are easy to make. Materials are cheap.
You need some magnet wire:

http://webtronics.stores.yahoo.net/32mawi1lbspm.html

A round cylindrical bar magnet:

http://www.kjmagnetics.com/categories.asp?gclid=CJXmz-DonZgCFRwDagoddmh2Aw


And a housing made from steel threaded pipe used in lamps:

http://www.nationalartcraft.com/subcategory.asp?gid=1&cid=24&scid=437

Here is the dwg.

Basically what you wind up with is a small alternator with a permanent magnet
field.

You could probably use this a source of low power with some diodes as
well as triggers. Probably enough current for the entire TLC 555 FI less
that required for the injectors. If you made them large enough maybe
enough current for the injectors as well.

Here is a dwg

Paul Lamar