I'm in the process right now of ordering the Velleman Ignition Kit, K2543, it is a Booster to use with ignition points.
I found one place that has this for less than $21.00 but I don't know about shipping charges yet. I'll report back later what the final cost is.
I believe this kit is mentioned on Snowbum's site. If not there I've see some reports that it works. Certainly much cheaper than a DynaTek Booster.