Local glass source for overflow

[aroundtuit]

Can anyone recommend a good local source for glass?

I want to put a 5' Calfo/horizontal overflow on a glass tank. The first place I called quoted $47 and change for one piece of glass, 59" x 4.5" x 1/4".

 

[aroundtuit]

Just got another quote for $10 and change. Unless they misunderstood the size, how can that be?