Vic, that certainly does look like a lot of fun. There's a variety of home-made options to consider.
I'm like mysticalflight, I'm glad we don't have rat populations like that, but the shooting would be fun.
Home-made night vision has been catching on quite a bit recently. I have had a barrel of fun putting together one for myself and using it on a .17 Remington. It works well for shooting over a bait site (where legal), and it can be used out and about but requires a little more attention to focus the lens for various distances. The good part is - It's cheap, and it works.
Here's some examples of my home-made outfit.
Here's some through-the-scope videos. Click the photos to see the videos.
The illuminator used with the gray fox is the LLTL-001 at 60 yards. Both videos
show a daytime scope setting of 6x.
I used an Eagle Tac T100C2 3.4 watt illuminator on the red fox at 60 yards.