Although my '88 is not an M030 car, I rebuilt my struts myself with new Koni inserts and the job was much easier than I expected. Attached is the link to my original post that has step-by-step photos of the project.
My struts were not M030 struts but I believe the process is the exact same for rebuilding.
Weekend Project Pics - Koni Inserts
Hope this helps......Vern
Also,
http://www.944online.com/home.html is a good source for your strut project - as well as Pelican....see attached link