That's a good recommendation, that part of the Italian coastline is nothing short of spectacular. Positano, Sorrento and Amalfi are all great, beautiful views and scenic drives.
Try this link for self catering accommodation
http://www.romanlife-romeitaly.com/conca… it's for Positano but...here are some tips:
- scroll down to the hotel search enter some dates and wait for the hotel search results (Don't worry that it says hotels and not apartments)
- when the results are returned you can check the Sorrento options or enter "Positano" into the search
- Now see the bottom left of the menu where it say "property type" uncheck all the blocks except for "Apartment", and it will leave you with a choice of apartments
- Do read through the tourist reviews (if they have) they are a really good insight
Enjoy!