I know a bit about putting together viable business ideas and projects that require similar levels of protection but not specifically what you are after, I noticed also my link to the NDA was incorrect. You can definately find examples of simple NDAs online - but really if your idea is patentable, and you simply dont have the finance to complete the patent you should be able to work with a company like the one in the last link and sometimes its more helpful to as they can bring the finance to create your first product range (They will also take a large percentage)
Firstly you need to decide if its going to be better in the long run to go it alone or go in with someone already in the market to help promote your idea, Big name or not.
IF you go in with someone you will need a GOOD patent solicitor, not just any old hack from the yellow pages go see a few its worth your time, they should be able to help you with what you can actually patent on your idea.
Costing point of view going to a "name" might open some doors in an advertising and manufacturing point of view that might not normally be accessible. Remember its often better to have a share in something that 100% of nothing when it comes to money coming in.
Oh and best of luck.
I work here at a company in Manchester that does prototype developmement from CAD, DXF, IGES files etc or just develops from wood patterns etc mostly for blue chip companies or smaller local ones.
The products were develop are thermoplastic based is this is of interest.