fgci.com has the lowest resin prices I have found. A local boat builder hooked me up with this one. He said use the boatyard resin with no wax. I also buy MEK (catalyst) from here and pay a hefty hazmat shipping fee. If you can get MEK locally the higher price will be offset by the lack of hazmat and shipping. boatbuildercentral.com is where I got my cloth. They have a huge selection and low prices. Both of these places ship super quick.
I was at my local home improvement store (Lowes) shopping for some acetone and noticed they had MEK for $22/gal. I realize a gallon is a bit much - you will need 2 quarts for a major project - but you won't have to pay HazMat shipping. The last quart I bought I paid $38 for including shipping which was more than the cost of the MEK. If Lowes has it chances are that Home Depot and Menards do too.