Yes, you can purchase just the brackets if you would like to source your own wood.  The dimensions of the wood we use are as follows: 4ft Bartop: 48” L x 12” W x 1” D  4ft Backsplash: 48” L x 5.5” W x 1” D 5ft Bartop: 60” L x 12” W x 1” D  5ft Backsplash 60” L x 5.5” W x 1” D