In an Alfa again!
Join Date: Jun 2012
Location: South Africa
Hi Reveds, had the same on my Spider. There is a cord that goes from the end of the spring where the broken bit is, through a "D' ring at the bottom corner of the roof, turns 90 degrees back, through a seam on the bottom edge of the roof and is fastened to the rear corner.
I used a long shoelace and fixed mine in five minutes.
It keeps the bottom side edge of the roof down and tight against the rear cover when the roof is up.
If you need pics, give me a shout and I'll shoot some this weekend and post them up.