I bought mine in Dec of last year. 96 sq feet was $85.44 or $.89 a foot. They came 12@2X24X48 panels.SPI is the company I found. They are on the net and nation wide with a dealor locator.
ya, rockwool tends to be cheaper everywhere, so if 703 is too much, check and see if they have rockwool. I decided to go with 703 becuse it is rigid and easier to work with when making panels. You just have to decide if it is worth it.