Just emailed the guy, hope he has one still!
Which would be better? The horizontal version or the vertical fittings? I'd want a ball valve obviously, unsure what else I'd put on 'er. Either close it up or a sightglass I guess.
Then to weldless install a heatstick into the side, hopefully that isn't too hard.
Edit: Also asking the guy if he would / what it would cost to weld a fitting for a heatstick on there. Gotta research what size that'd be though. Looks like 1"