i have a few small pieces you can seed your tank with.. and then just maintain your levels of mag alk and cal, it will grow, it takes time.. doesnt happen over night.. but if you dont have any in there now using all the purple up in the world wont help(please dont use that it was a joke and that stuff is junk) but like i said i have a few small pieces i can give you if you wanna take a ride out..
You can get the live rock at a LFS or through another reefer local to you.
Best to scrape off some of the coralline as it helps 'seed' your own rock.
If you plan to place a ad here to purchase something - please put it in the Want To Buy Forum on the Marketplace page. That is the only place we allow selling & buying here on this site.
Thanks