New Client item build area ( where is it?)

As the title says, I can't find it and see that its not going to be included in the the new client. Is this in fact true? What can I do to make item sets? is there a website that can build the config file for a item build that I can then import into LoL directory?

I really relied on that item build as a way to keep my item build paths concrete. Sad that its gone, wish I could get it again.