The same exact stuff is in various Stax also as you know, and I pointed someone here to a rare spare set of the stuff in Germany for a Lambda model. To alleviate any confusion or fears, the product is known as Micron Glasswool, and labeled directly as such.
If you look up Glasswool it does come in various forms, and is still used to this day ( on pipes etc ), so don't sweat it, Then again I hate the stuff myself and always get rid of it in builds. but to many folks 'tis valuable stuff, saleworthy in fact.
Breathing issues not here but never can tell. Fibreglass always creeped me out for that stuff since once it gets in there it shreds things up.
Edited by nick n - 3/18/14 at 9:52pm