Can I configure Watchguard Policy Manager to allow the download of a specific content type from a specific website?

I am trying to configure our Watchguard Firewall to allow the download of Microsoft Office 2007 templates direct from within the application for all trusted users.
The templates MIME type is application/x-cabinet, which we have blocked the download of for all users. This is a policy that we will not change.

However, is there any way that I can allow the download of this MIME type and this alone, and ONLY from the specific site (Currently /

We are running an x1250e and the software version of Policy Manager is 10.2.7.

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This can be fairly easily accomplished as the website in question is one or few mirrors, proceed as below:
In Policy manager; create one more HTTP Service [in addition to what you already have, this service if you wish can be packet HTTP or proxy]; configure as below:
Enabled and allowed; from any-trusted; to public-ip-address-of-website,mirror-ip-if-any

If you have selected packet HTTP then no further configuration is needed; however if you have HTTP proxy then allow the content-types one being application/x-cabinet, and others as needed.

Please implement and update.

Thank you.

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