Greg phone around to some glass shops they will be able to drill the tank for you.

As far as a refugium for a 7, I would say if you are going to do it, just use a rubbermaid container with a Power compact 17 watt, its an easy and inexpensive way to go.

FWIW I love those 7 gallon bow fronts, check out the pictures section there is an excellent picture of one AND the guy tells you how to save $$$$$$$ on lighting..