have a look at manxnotebook (tab line above) or www.manxnotebook.com.
IGI - see www.familysearch.org
iCentre is in Douglas IoM
you can borrow the films of the official copy of parish registers at any Mormon(church of Jesus Christ and Latter Day Saints) family history centre (the film numbers can be found either from page under famhistory - ldsfilms on manxnotebook or via the IGI) - use the link on family search or your telephone directory to find nearest or since you have dates buy the copies from general registry - (I should encourage this as helps reduce my taxes!)