If you are looking to find solid AdWords Script Developers to build custom scripts for you, you might find the following resources useful:
Adwords Script Developer directory on Freeadwordsscripts.com
Freelance Adwords Script Developers on Upwork
If these don’t work for you, you can always hire a decent Javascript developer to do the job.
You will want to look for developers with familiarity and experience with the AdWords API, and are able to provide ongoing support if you run into issues or need modifications.
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