no idea if on mormon microfilm - they are on film at Manx museum - an index of a sort was made to cover from mid 17th C to about 1770 - I have a copy of that index however one of the researchers doing the index died a few years ago so index stops abruptly - I'm back on Island in abt a week when I usually do 3 mornings research in the week

suspect there may be some detail as index indicates 2 page refs