Update README.md

Author: klyburke

README.md

@@ -451,6 +451,7 @@ Want to support this project? Sign up at [async](https://async-await.com) and/or
 
 You can contact us at [email protected]
 
+If you want to hire us to customize or build features on top of our [SaaS boilerplate](https://github.com/async-labs/saas), please fill out our [form](https://forms.gle/vaLHem6Ccmp3hics6).
 
 ## License
 All code in this repository is provided under the [MIT License](https://github.com/builderbook/builderbook/blob/master/LICENSE.md).