LF 50-90g tank or sump for cheep

[fishoholic]

Hi I am wanting to add more live rock to my system and have a bigger refugium area, so I am looking for a used 50-90g tank or sump to add to my current set up. I don't mind if there are scratches on the glass as long as it's a good price and holds water

Also it can not be drilled on the bottom, as this tank is going to sit on the floor under my 230g fowlr tank. Drilled on the side or back of the tank is ok.