Rather than directing him to something someone else wrote maybe you could write it in your own words so it’s your own work you send them, that guide you mentioned. And have the note at the top:’
I have been waiting to hear some information I need from you so since you have not provided that yet I am offering to send you what you ordered any time in the coming 30 days after you let me know what kind of business you have.
Try it at your own risk. I’m throwing out a suggestion but the decision to do this is yours.