For people interested in out of production rockets (particularly in cloning them), JimZ’s Rocket Plans at http://www.spacemodeling.org/jimz/index.htm has been a really valuable resource. Unfortunately in recent years quite a few of the files have gotten lost resulting in broken links. In some cases the Internet Archive Wayback Machine can be used to recover the missing scans but some of them never got archived there. Just a few weeks ago Chris Michielssen was lamenting the unavailability of instructions for the Centuri Long Tom.
Well, they’re all there on the JimZ site now!
From this thread on YORF it seems Tony Reynolds spent his holidays giving the site a much needed revamp. Looks as though there may still be some issues but they’re getting addressed. Excellent news!