I am often asked where I acquire the materials I use in my work. The answer isn't really simple as they come from a multitude of sources like our town dump, dumpster diving, craigslist, roadside trash pick-up, as well as gifts from friends and family.

But there is one online source that I check regularly and that is Sequential Glass.  Sequential Glass is an adjunct to a larger architectural salvage firm and specializes in collecting things Steampunkian. 

. . . 

At the moment Sequential Glass has a selection of interesting Medical prints on offer as well as a large selection of laboratory glass as well as the usual gears, cogs and gauges.

In the past I've purchased such wonderful things from Sequential Glass as the gas lamp arms that support my Steampunk LCD monitor:

It really pays to check in regularly to see what they have on offer!