[spaghetti]

Both Todarosport and Emporio del Pescatore have good prices and feedback. Try also Islandparadise, inside Rome (address is Via Appia Nuova). In Venice I don't know. I have only one friend who spears there and he buys his gear in Mestre, that's on firm land, not in Venice city.
Prices? The old mimetic med and ocean mimetic are now available in sell-offs at 120 euro or less. Average price for new models is 140/160 euro.
Have a nice journey, and taste the Sarde in Saòr (venetian fish dish with sour onion dressing).