Sales Email Design

We're looking to create a Sales email that can be sent out of our Gmail accounts. We have created an email layout using an email-sending programme (a screenshot of this is attached) but we'd now like something similar to be sent out of Gmail.

We are looking for this to be done asap. Our company is a Forex broker and the email we're looking for will be for us to send to potential clients giving them some information about the services we offer and the benefits of trading with our company.

We'd like the attached image to be used as a guide - a banner along the top, three buttons down the right-hand side and an area of text left-aligned. We would need for this area of text to be editable and, as stated, we would need for this email to be able to be sent out of Gmail.

I have also attached a possible banner (the one used in the current email) and our logo. More visuals along with exact company colours/fonts, etc. would be available also.