I just received a call from Ryan Blackwell who is now running Kyros Technologies LLC and he has a website where he'd be happy to sell us one or more bottles/cans of his product. www.magneticdeveloper.com I have also updated my blog post about this at http://richardhess.com/notes/2011/05/30/update-kyread-spray-on-magnetic-viewer-fluid/ I'm not saying this is the best/only way to develop tracks, but it is a good way and it is good to know that one useful tool is still available. Cheers, Richard -- Richard L. Hess email: [log in to unmask] Aurora, Ontario, Canada (905) 713 6733 1-877-TAPE-FIX http://www.richardhess.com/tape/contact.htm Quality tape transfers -- even from hard-to-play tapes.