Ignitech website: ignitech.cz/en
You want the TCIP4, version 88, I believe. I sent them an email, stating that I need for 83 Yamaha Venture, "plug and play". They will respond with what you need and cost. I paid $193, including shipping for mine. (mention venturerider.org for possible discount). You will need to replumb your vacuum source, but lots of info on doing that on this site.