Buisness email letter

Hi, I need 4 standard business letter to send to potential customer: 1-Letter to introduce my company and what it can offer. 2- Letter to consider my company as potential provider for their company need. 3-letter to tendering committee to accept our proposal 4-letter to invite client to try our specialize training 5-letter to company to provide us about their need in order to asset them. i need this letter not to long 500 to 700 words or less depends on the letter. I need this email letter to be good written and have some creativity in it. I will provide you the company website that i need this letter written about and it has all the information you need. i need this letter urgently.