I'm a beginner and need some help please!

I have two existing glass tanks (with clear silicone rubber joins) that I used
to keep scorpions in a long time ago (both tanks have since been cleaned and
sterilised).

Tank 1 measures: 16 x 8 x 8 inches (406 x 203 x 203 mm, approx.)
Tank 2 measures: 24 x 8 x 8 inches (610 x 203 x 203 mm, approx.)

I would like to use one of these tanks as a start-up tank, preferably the
smaller as I have very limited space. I've read that small tanks aren't always
a good start, but let's ignore that for the time being.

However, with such a small tank (Tank 1) I am having difficulty finding
lighting hoods to fit. 
Can anyone suggest retails sources? 
Thanks