Hi I noticed your looking for some base rock and I also found my old post in the link about building base rock.
If you or someone else is interested, I have two peices left over (didn't fit in my 33 gallon) from the base rock that I made. It is all cured (3 months) in freshwater and dry right now. You should just put it in saltwater for a week or so and then it can go in your tank. I did this with the rest of mine and all went well.
Anyway, its only 2 pieces left (they weight 7 lbs together). Here is a pic
I will sell em for $10 total. I know you're looking for more, but that is all I have left and it might add more variety in your rock...