Inline Goalie Pad Help!?

Yeah so heres the idea I used to play hockey and I was a goalie but I played Ice my pads dont fit anymore and Im gonna play for my school inline team. For inline can I just buy cheap street hockey pads inluding helmet, chest protector, glove, etc. since im not playing on ice or should I go spend all my money on expensive ice pads or can I just buy street pads because Ive never played inline before. We play on a flat surfaced rink with a inline puck. I am also around 5'7 so what size pads should I get? Thanks So MUCH! :D