where can i find an in store glass top dolphin table?

Answer 1

Here... there are lots of them. Perhaps some are near you. I hope this helps:
http://www.google.com/search?hl=en&ie=ISO-8859-1&q=dolphin+base+table

Answer 2

why not try either Lowes, home depot or even a craft/custom frame shop? Lowes will probobly be the most inexpensive. If you go to a custom frame shop they will generally have up to 3-4 types of glass you can choose from. But be sure to ask about the types, cause they won't tell you unless you ask directly. Instead they'll give you the most expensive which is only meant for signed, numbered and original art.