How to show Web Resource in Portal

Hi,

We've developed a custom solution which includes web resources. The web resources include custom js/css to render custom entities. Now Client wants to share the custom entity via CRM Portal and would like to use the same web resource rendering in Portal. 

So far this is what we've tried without any success:

1. Created a custom entity form where we've embedded our web resource which is working fine in CRM Sales module.
2. Exposed the custom entity form via Portal. But not rendering properly as the references to css/js files are missing in portal.

Can anyone please suggest if it's possible or best practices around using custom web resources (with css/js referencces in it) in CRM Portal?

Thanks

Sohel