I have found that there are only a few options if you have to find your own coverage. It is important to either find either occurence coverage or coverage that hs the "Tail" charge built into the premium. this assures that once you no longer need the coverage that is wraps itself up and you have this coverage for the life time of the exposure you create during this period. I tried a link that I found when I googled for coverage
http://www.equotemd.com/ and they were very helpful. The coverage was expensive in my opinion but they did find an option. If I recall it was around $1500. Please post if you have found something else.