PVC pipe? Sink drain elbows are really tight. Some are chrome plated brass. They use telfon, or nylon compression gaskets.
1 1/4 and 1 1/2.
Most parts stores have a WALL of radiator hoses and heater hoses with different twists and bends. You could aske them to let you go back there and look. Buy hoses, cut out what you need, put the rest in the project bucket.