Sump building

Hello,



I am in the process of building a sump for my 90 gallon aquarium and would like to know where would the best place I could purchase the acrylic or glass panels that I would need would be. I live just outside Columbia, SC and it seems that every place I try it would cost me more to purchase the individual panels than it would be to buy a sump but since I need the rest of the equipment as well I am trying to keep the cost of the sump as minimal as possible. I am looking for a sump around 35 x 15 x 15. I have a short stand so that is the reason I need a custom size sump.



Also, I was maybe thinking about going with an external skimmer but have heard some bad things about them with leaking. What is your opinion?



Thanks,



Glenn