Recently was in a Lowe's Home Center.
Found a LARGE whole house water filter housing. It was about 4" dia, and 12"-14" high. There would be plenty of room for plates or even tubes, and it has the "O" ring sealing system. Not transparent, but, using a transparent bubbler cell, I'm thinking this would be a way for folks looking to build a cell, that have limited tools or mechanical ability, to get started.
Price was right at $50.00. That might seem high, but, it's pretty much ready to put the insides into, and they hold 65# of water pressure, so, I can't imagine why they wouldn't work for
SOME vacuum, at least, if not a high vacuum.
I would think
SOME vacuum is better than none, EH

My next trip to the states will include buying one of those housings. I have LOTS of room under the hood of the Fryer oil burning, Land Cruiser.
