Plumbing ISO Drawings

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We do alot of submittal to the state for plumbing approvals. We are looking for symbols, pre drawn systems, etc. This allows us to build a specific plumbing system that has been approved by the state and does not need local inspection. Not sure if there are stock drawings for lav drains, shower drains, or even complete bathrooms. I have looked into buying a symbol package for plumbing but they only give you a list and no views. Its hard to justify $300 on something you can't make sure will work. It is all for residential construction.

Any help, thoughts, suggestions would be greatly appreciated. Thanks