I was typing my description and lost it. So briefly: I am a PH.D. trained professor of business at a leading public university and have 40k hrs of professional practice time logged in helping leaders and professionals from many of the world's finest companies in the areas of leadership, job coaching, communications, etc.
I have also coached numerous people in the job search process and have worked for recruiting and outplacement firms. I am known as the interview master and have "landed" several candidates.
After reading your description, I am uncertain what you are looking for: a cover letter should be one page.
Here's a menu of job search services I can provide you: 1) create a compelling cover letter: $75; 2) 2) help with resumes (main resume and special "in action" resume you use during interviews): $200-300; 3) intensive interview master coaching, including sample script and discussion guide: $200 for one hour and $300 for two hours; 4) provide you with templates for 100-day performance plan and playbook to use during interview: $50; etc.
I have excellent references. You are welcome to check me out on my LI profile and feel free to call or email so we can discuss and I can customize a program to truly help you land a job. But to be clear, what I do not do is get you interviews, leads, etc. but I can teach you the skills to do that yourself, especially tapping into the hidden job market, using a proven 15-10-2 approach. Happy to help. Let's talk. Dr K.