A bile acid test looks at liver function. It can help rule out a shunt or MVD. Dogs with MVD (small shunting throughout the liver) can be asymptomatic, so they don't have to be depressed.
Amylase and lipase have to do with pancreas function.
It doesn't really sound like pancreatitis, but it would be one of my first thoughts.
In the US, all we have to do is say we want a copy of the blood test results and they hand it over.
In fact, I just asked Ellie's vet for this and she had them copy the whole file for me. If you paid for the services, I would think you have every right to those papers.
Have you thought about trying homecooking to see how he does?