There are a lot of examples of Business Partnership Proposal in Internet. They are typical. But at the same time you must consider the specific of your niche.
You should describe in some words your business (existing situation, your goals), your proposal, benefits that will get your partners from dealing with you.
Some items of proposal:
- Goals/Benefits
- Key Project Participants
- Analysis of Current Situation
- Proposed Solution
- Measurement/Evaluation
- What Your Partner Will Provide
- What Your Partner Will Receive
- Signature Lines
- About Your Organization