Inquiry About Redistribution License for Web Templates

I run a CMS-based DIY drag-and-drop website builder. Our subscribers select pre-built templates and create their websites using these templates. I need at least 100 web templates and more in the future. Could you please provide information on the following:

1. Do you offer any HTML, CSS, and JavaScript templates with licenses that allow for redistribution?
2.  If yes, which specific templates or collections come with such a license?
3. What are the terms and conditions associated with this redistribution license?
4. What are the costs involved in obtaining such a license for these templates?