I need 3 custom mailchimp email templates creating

We have just rebranded and launched a new website. We have used Mailchimp for a number of years, however only used the templates that are provided by them. Now that we are rebranding, we would like to have mailchimp templates that are tailored specifically to us to increase the effect of our email marketing and maximise the impact of our rebrand.

I am looking for 3 new templates so that we have the flexibility to use a different template for different types of campaign, e.g. one template for announcements, one for promoting a product range, one with a seasonal theme (Christmas). Details can be discussed further.

I will need to be able to import the templates into mailchimp. Our new font and brand colours would need to be included.