Welcome!
My friends and I have been doing all grain brewing for about a year now, as well. My friend that got me into it built a setup using three half barrel kegs. It worked great, but we are currently upgrading to a new system with more automation and temperature control. We are also looking...
Teja's Smokers is a great supplier. I have used them in the past for other projects. They can make up any combination of their parts that you would need. Here is there website.
www.tejassmokers.com