I think most trip booking places will have it, if it says fishing, just ask if it's savas boat. We book ours at the one 2 doors up from Cupids (up towards the square, next to sunglasses and watch shop) - Unicorn restaurant used to be next door but it's a clothes store now. The boat goes from Marmaris, they pick you up from your accomodation around 9am and take you over there. I'm pretty sure they'll bring you back too but we always wander off round
Marmaris on the way back and have a bit of a mooch round.
I've got tons of pictures, I'm working my way to putting them in an online album to share but it takes ages on my connection, I'll see if I can do a seperate one for the fishing and post the link tonight for you.
(Hope there's some fish in July!!)