Ancestry has added 19,715 records in the collection: Web: Isle Of Man, Wills Index, 1600-1864
A search returns Name. Will Date, Court House, Will Place and the Original URL.
The original data is Will Summaries. Isle of Man: Joyce M. Oates, at http://www.isle-of-man.com/manxnotebook/famhist/willsums/index.htm/. I’ve not linked it as Bitdefender blocks it as suspicious due to an expired security certificate.