Most of the drawings you'll need are out there, Mike. Hopefully Brad Rankin, the type certificate holder, will make the rarer ones available in the near future.
Some parts are available. Those that aren't can be readily fabricated from the drawings, by you or someone you hire, as owner-manufactured parts on a FAA Form 337. LP Aeroplastics, of Jeanette, PA, has the mold for the windshield, but not an STC, so they can make one for you as an owner-manufactured part.
You may fit, Mike, as height and leg lengths are greater factors than width in the Collegiate. Your only concern should be if the stick will hit you in the tummy. There are other Collegiates out there for sale. They seem to sell in the high teens/low twenties, when in good condition and flying. You could easily put that much into restoring a project, but then you'd miss out on the experience of restoring one of these old girls. Pat Cole, who has a motorcycle shop in Bryan, Texas, was selling his Dad's CP-50 that has been sitting in storage for quite a while, but I don't know if he ever sold it or not. That old girl could definitely use some work. She has an A-65, but I think her prop was stolen.
There was someone in central Montana that had two projects for sale, cheap, a couple years ago. Look back through the forum and blog and call some of these people. The one near Rochester, NY sold. Steve Weaver, in West Virginia, is asking way too much for his.
Hi Mike: Welcome to our wee club for the skinny birds!
If you are over 6' tall and/or 180 pounds, you may find the Collegiate's cockpit a bit claustrophobic and not at all comfortable to fly in.
There was a Collegiate project in the LA Basin for sale and you can still find the posting for it in the forum or the blog section. A woman was selling her grandpa's project about a year or so ago, but I never heard whatever became of it. Restoring a Collegiate is quite an adventure, but it's quite enjoyable and they're a LOT of fun to fly once you get her back in the air. Read through the forum and blogs to get a sense of what the Collegiate is.