Some way to allow users to use different template.

I am using New Blog Templates plugin. I have set up two different templates, one is default. I want to offer some of my clients to use the new template.

Can I export the ‘New Blog Template’ and allow users to switch templates like normal?

Is there a way to export or save the New Blog Template, so we can offer it to people who purchase access to it?

Right now, we have to delete the user old blog (and all contents) and then create a new site in the admin backend with the different ‘New Blog Template’.

I need a work around this so we can offer these templates as upgrades or options.

Any help would be the most appreciated!