http://img156.imagevenue.com/view.ph..._123_867lo.JPG
Private National News #1 seem to suggest that she was in Jolley Hockey Sticks and that she could have been charged for appearing in that film when John Lindsay was first brought to court (Oct 1974).
I haven't seen any hardcore that she has been in, I haven't seen the whole of the Private National News to further confirm any other pics. Simon Sheridan (I've got second printing of 'Keeping the British end up' don't know what issue 3 adds - also says that Ava appeared in a number of hardcore loops from John Lindsay. The Jolly Hockey Sticks currently available doesn't have her in it, there might be a different version - not unknown, Juvenile Sex has 2 versions. But, I know of no hardcore loops that she has been in. Which doesn't mean there aren't any or that that there are.