Sailcloth is just a type of fabric, but people use it as short hand for a top. The top you want is probably the Bestop Replace-A-Top in Sailcloth. (that's what most folks mean when they say 'sailcloth').
The Replace-A-Top uses your current factory hardware, so make sure you save -everything- even the little screws in your windshield header.
We have a list of retailers on our web site. I don't track their promotions, but they're always running deals.
We're offering a rebate of $50 on the R-A-T right now, but that's good no matter where you buy it.
And here's a video for how to install it: