My husband and I have a very large (

My husband and I have a very large (325sqm) home in Central London in a very historic area close to everything. We are keen to visit Venice 2-3 times next year and would like to find someone living in Venice who is just as keen to visit London regularly. We would then swap our home in London for their similar home in Venice, totally free. I have tried the UK home swap websites, but choice is limited, and the homes tend to be small. I have thought about placing my own advertisement in Venice cultural magazines / media, but as I don't know Italian, I have found it difficult to identify the right media. Any ideas ?