Have you checked with your school district? Some school districts will have a copy of the IAS and the forms. And sometimes people will have single forms to sell. (I think the forms are normally sold to schools in packs of 10, but if your school doesn't have them it sometimes works to fill out as much as you can, and if it shows your kiddo is a good candidate, bring the form to the school.

We got a form from someone who had extras and used that to help convince the school to accelerate our son. We didn't get the book. The forms have some explanation, so for us the book was not necessary. The forms include several questions about various relevant issues, including IQ scores, achievement scores, age of child, social questions, etc. each item is given a score by the parent and the teachers (I found it best to fill it out separately to compare). It's pretty objective, and so more convincing to schools than a parent just saying "my kid needs to skip".