New Blog Template: option to select template in WHMCS provisoning pluggin

I would like my users to buy a package in my WHMCS system but ideally I would like them to choose a template from the "new blog templates" plugin. I have also the WHMCS provisioning installed so perhaps a "custom field" and/or an option to set the template when provisioning the account in WHMCS, do you have something like this in place or in your "to do" list? If not how can I achieve this? Maybe a function I can add somewhere that would get a custom field from my WHMCS when creating the new account in my multisite wordpress.

Your help is much appreciated,

Kind regards,

Flaviano