Go to my "Other" home, there are many really knowledgable folks there. It's the #1 site on the web for Lincolns. http://www.lincolnsclub.org
You don't even have to join to post! Many dual owners there, as I am with both a Caddy & a Lincoln. Friendly place.
Go To Ebay Motors And Type In Lincoln Springs. Item No. 2442389646 Seems To Be What You Are Looking For. If Not Correct For Your Application, Ask The Seller A Question. Looks Like He Sells All The Conversion Kits? Hope This Helps, Bill.