There may be other sites for the records you're interested in - but I don't know any for Islay. However ScotsOrigins is really exceptional - the first online site to access an entire government's records. Amazing! You ought to explore it. It's very exciting to have simple access to such an detailed, extensive set of national records - much, much broader than EnglishOrigins. (The relatively small size of Scotland combined with the thoroughness of the Church of Scotland's records made it all possible I believe). I've found several family records there. I know that it isn't free - but it sure beats the price of going to Scotland yourself.