NOPE from all I've read they are different. different size and mounting locations. My "cab plus" has a pissing tank as well and I thought I could use my reg cab tank.
just look for a std cab tank that is carbd like yers. but you can make the ex cab tank work, as long as it is from a carbed 2.2/2.0, it will have the same hook ups. just gotta make room for it