Hi Tim,
It's good to hear you've got another project. That's the way to gain a portfolio.
As for a proposal, as far as I know, there really is no standard proposal form, although there may be other copywriters on this forum that may use one. I just simply find out the clients specs, and write a proposal based on what the client wants done and my price for the work. I don't make it too complicated.
For instance, I amy provide a proposal like this:
Dear CEO (name goes here),
I understand you need someone to produce a sales letter for a product you are trying to sell to the US (or whatever the request is about). According to your requirements, you need this and that done.
I have so many years experience as a copywriter and have samples to provide you on request. Because of my background and years of experience, I propose a price of $1000 for the sales copy. My price also includes up to three revisions.
As for the price, I do require at least half up front with the rest on delivery of final document.
As soon as you approve my proposal I will need you to send me as much information about your product so I write the best sales copy for your product.
Thank you for your time and I look forward to working with you in the near future.
Sincerely,
Tim
I follow this type of format and get work every time with not too much hassle.
Hope it helps.
Harry