My .02 is that all that will stand up in court is testimony from an "expert witness". So you need to find someone who is a professional expert on collapsed hoses and see what they will charge to investigate and write a report, and then how much to testify in court. Then there are your lawyer fees. Might be cheaper to buy a new engine and don't buy Gates hoses. You might contact Gates to see what they say. I had a Champion spark plug that disintegrated in my Toyota and wrecked the engine. I took it back to the auto parts store and the guy says "Yeah Champion's do that". ???? Did I ask them to buy me a new engine? No. I just cut my losses. Hard to prove that it isn't "something" I did.

__________________
1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra