Though you said you didn't want to make anything I found an excellent solution to the same problem when I needed a vacuum chamber.
While looking at commercial (about $800) vacuuum bell jars with pump/base I noticed replacement jars. I bought a replacement 12" jar from Contenti for $129 and a robinair vacuum pump on ebay. I just made a simple aluminum base plate and used a valve/hose/fittings from Home Depot.
The end result was a professional type vacuum bell jar that is easy/fast to use. It took a couple of hours to assemble and would have been less w/o the sprung feet.
Though maybe more than you wish to tackle it ended up better than the alternatives at a great price. Maybe something to consider?
PS I really like teh Robinaire pump.
--- In firstname.lastname@example.org, "mmitchell_houston" <mmitchell_houston@...> wrote:
> Over the past week, it's become obvious that I'm going to need a vacuum
> chamber to improve the quality of my silicone molds and decrease the
> amount of bubbles in my resin. So, the ability to achieve 29 inches of
> mercury is essential for this piece of equipment.
> Right now I'm looking seriously at purchasing one of these two models:
> 3-gal tank with 10-inch interior diameter:
> 5-gal tank with 12-inch interior diamter:
> I like the width of these pots (particularly the larger one), and the
> fact that everything is all together and I'm not having to put it all
> together from parts and then HOPE it all works. I don't have time to
> fiddle with something. I need a solution quickly.
> That being said, I'm NOT looking for any "how to" advice on how to
> build my own. I've already decided that don't want to. I have a budget
> of $300 - $500, including shipping and taxes. If you can recommend a
> dealer who can provide me with a good vacuum chamber (new or used), or
> even build me one yourself (I would need photos of yours and we'd have
> to talk about the specs and your ability to get it to me within a week
> or two), then please contact me:
> Mike Mitchell, Houston, Texas
> mmitchell_houston [- A - T- ] yahoo [ - d - o - t - c - o - m -]
> And yes, I've garbled my e-mail address in an effort to confuse any
> spambots out there. ;-)
> I'm hoping one of you guys can help me. Thanks in advance for your help!
> [Non-text portions of this message have been removed]