Do you have access to a chop saw that has a metal blade? DeWalt makes a great one that will cut through those pipes like warm butter!
DeWalt Stationary Saw Cut-Off wheel 14"x5/32"x1"....If you don't have a chop saw you can get a cheesey one for like ~$80 that will do the job the important part is the wheel ~$15
_____________________________________ Scott 90' GSX, 06' Effo SSL