I don't have LR for sale, but wanted to give you a warning before you spend alot of money: You could obtain 200 lbs. of completed coralline-covered live rock, and it would die off, if your system parameters are not suitable for coralline growth.
How old is your setup? Do you have any coralline spots growing in your tank now?
I have about 100 pounds of purple coralline covered tonga branch rock, 100% covered in the purple stuff. It should retail around $12 a pound, how much are you willing to buy the lot for?
You get coralline from good water perimeters and lower light, putting my rocks in your tank will not guaranty it will stay purple if your water and light are not the same as my tank.