I had a difficult time finding a good local resource as the developers I found needed me to teach them how to develop for Marketo. My recomendation would be to use a global agency such as https://www.grazitti.com/ . They are easy to work with and I trust their templates.
I've developed dozens of email and landing page templates for Marketo, and have experience debugging ones that are throwing errors as well. Though I'm happily employed, I am available for short term remote freelancing if you're still looking for someone to help out. What exactly are you looking for? How many templates?