Everything's custom built. The stand is getting welded right now by a friend, and the kettles are custom made by a local metal fabricator. We looked at off the shelf kettle options, and the biggest we could find was 100g without getting into real serious professional pilot systems. Our kettles will cost about that much, but they'll be ~125g so we can do full 3bbl brews. All the fittings for the kettles and fermenters are from Brewers Hardware (supporting vendor here- super helpful and friendly guys).
The fermenters are the Ace-Rotomold inductor tanks, modified with sanitary everything (see: Brewers Harware)- we have 6 of the 110g full-drain variety. Not sure we'll be able to net a full 3bbl out of them, but we'll see. Got two of them used from a local brewery that's upgrading. Using March AC-5B-MD nanobrewery pumps, which are on their way and a Monster Mill MM3-2.0 driven by a drill. Chilling will probably be a bigass plate chiller from Dudadiesel, but haven't pulled the trigger yet.
That's all I can think of ATM. Feel free to email or PM, or I can answer whatever questions here. I'll try and get a build up as soon as we, you know, start building. Cheers! Re: pilot batches: we can't brew them in out brewery, even if we're not going to sell them, until we get our license, so we'll have to brew and ferment them at home, and even then we can only do two brews before we hit our yearly homebrew limit (and yes- the TTB/ABC are watching us now so we can't fudge this) so that should be interesting. Hope we can get everything dialed in with two brews.