I'm looking fof a circuit breaker that has a 20 amp on the outside then two 30 amp breakers in the middle then it has another 20 amp.This is what is called a quad.Like it is all one piece.It's used in my 1994 SCHULTZ MOIBLE.I'm at the end of the road could you find me one please.

What brand name panel do you have? Each brand is different. The brand name of your home is irrelevant.

What TK said.

This is not something you'll find in a home center usually. Possibly an electrical supply house will stock them, but they usually only have two or three brands with one being their full stocking line.
You can find literally anything on the internet.