I suggest going to google with this string: auto insurance for collector vehicles

Not because the 240 is a collector, but because it is old and still worth a lot to you. The hard part is then for you to determine what the value should be.

"Normal" insurance for a daily driver is never enough. Most companies will value the repair with new OE parts, and there are no more OE parts for your car unless they send off to Europe.

Perhaps you could strike a deal with the current company. You get the parts from a JY, send them a copy of the bill and they pay you back. Of course, the labor would have to be negotiated...