I have a number of bottled specimens from Miskatonic University up on Ebay this week . Low on cash? Then click on the "Things In A Bottle" label at the bottom of this post for directions on how to make your own.
Update: In response to some emails, no, these aren't showing up for folks outside the US. Because of the requirements for shipping liquids internationally I unfortunately can't mail them for a reasonable price. The fluid inside the bottles is harmless rubbing alcohol (isopropyl alcohol) or propylene glycol, a moisterizer used in foods and cosmetics, but transporting either via the post is a huge hassle.
I spent the long holiday weekend camping, but later today I should have a look at making one of the definitive Mythos props- tentacles. For less than fifty cents a foot, no less!