Hello,
I'm new to this forum and saw your post while perusing the site.  Its been a while since you posted so not sure you'll see my response.  Some vintage parametric EQs were made by a high end company called SAE.  I have their 1800 model which I've been pleased with though I don't use it much anymore.  If you're interested I might be interested in selling.  They made a couple of models over the years.  I think they made a 2400 as well which was more expensive.  Good luck.
Matt