Not sure of any templates but check out Meera Kothand. She's an email marketing guru I follow and she's always giving away freebies or teaching/blogging about putting together email sequences. I've learned a lot from her. https://www.meerakothand.com/114 Plus she has a free email course going right now.
TC Headley
Brand Strategist, Divi Designer, Mac & Cheese Connoisseur