I've stayed a couple of times in Peel, but the problem is that the best cottages there and around are booked early in the year, as I have found out already. I think the one on the Prom you're thinking of is Ben-My-Chree, but the owner has another one which has room for 5, where we stayed in 2014. If you look at peelonline.net you'll find these and some more. I tried putting the whole address but was accused of using 'naughty' language! Good Luck!