Customizing Infusionsoft Forms

Anyone know a good solution for customizing Infusionsoft forms?

I'm currently using the Contact Form 7 - Infusionsoft Add-on plugin but the number of fields that link up are limited to seven commonly used fields. My client has longer forms they would like to use, so this isn't a perfect solution.

I've already tried formatting the forms as much as possible within Infusionsoft as well as trying to customize the HTML and CSS but I didn't have much success with getting them to look attractive, in my opinion. Plus, it took FOREVER to do one form and I have 7+ I need to add to my client's website.

Any suggestions for easy customization through HTML or another plugin that lets you use all fields, would be appreciated.

Thank you!