I have a box of forms under my desk at all times. (Also get extra cover sheets!)
Banks will deal with individuals when it comes to REO's you just have to know your stuff. So if you're a small investor like myself, they are really happy to hear from you and you can build a relationship with the 'loss mitigation' department.
If you stumble in your phone conversation too many times, or don't know all the answers to pertinent questions, they will cut you short. After a while you will get to know your way around and could pull-off a nice deal. Just depends how smart you are, how determined and how bad you want to save money. Patience is also a great virtue when dealing with a bank.
I'm sad to see there are agents out there still lying through their teeth.
To directly answer your question about the form, I'm sure you can Google, "offer to purchase" in CA and you'll find somethign to download.
But like most here have said, it isn't adviceable to do this on your own. First, banks will not work with your directly and second you put yourself at a disadvantage liability wise on several levels.
There are a couple of thing you might want to bear in mind:
A bank is not going to sell an REO property to you directly. No offense, but you don't know what you are doing. They require that a professional (i.e. Realtor) be involved to get the sale completed.
Secondly, you might want to write this down:
"Confidence is the feeling you have right before you truly understand the situation."
Since the "short sale" and "foreclosure" terrane is a virtual "mine field" we strongly recommmend that buyers interested in this type of transaction, be supported by the services of a real estate professional.
The "Eckler Team"
I think you will find that the banks will not deal directly with you, they are so overwhelmed with the number of foreclosures and short pays, they will assign the property to a realtor and they will deal only with the realtor. Best of luck to you.