I bought an Italian DVD of KILLER FISH. It's OK...but I think you can watch the whole thing on YouTube. BORDERLINE is I think available on DVD from DaaVeeDee.com look for it online or search the title on Amazon. FIREPOWER can be downloaded from Amazon.
Don't get your hopes up; it's pretty lame. I do like the Chicago locations, though, which immediately predate the city's filmmaking boom in the mid- to late-80s.