I'm pretty sure there are guys who can make you one of these for the right price.
Don' think it would be to hard to make a better one.
Just don't put liquid in there. Or just fake the liquid by having Gel in a small enclosure in front of heads
then run a small pump to make it bubble and put some of that luminous crap in that makes it glow.
Or just sink it in a resin block.
They had a 2 tank version that was like 30 - 50 bucks on ebay..