Need help finding portable vacuum dessicator

From:Bernard Ian R SSgt 59 CRES/MSROP

I need a purchase source for a good vacuum dessicator that has a control
stop cock to allow pressure in and shuts it off to maintain pressure.  This
dessicator will then be place in a 4 deg C fridge for a number of days.  I
hope to maintain the same vacuum pressure all through out while in the
refrigerator.  Any ideas? (a source will be nice).

Boring a hole in the fridge to maintain pressure is not an option.  I will
be using a plastic/monomer organic solvent(Methyl Methacrylate) in the
dessicator.  It needs to be under vacuum pressure.

Thanks histon

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