You have to go in and ask if they have any off cuts that you can buy.....told them I didn't care what the glass was as long as it was thick enough, that $40 was glass and cutting :wink:

here
http://www.melevsreef.com/allmysumps.html

and here
CUSTOM SUMPS, REFUGIUMS, RESERVOIRS, BERLIN SYSTEMS

and lots of sump designs.
hth