I would like to get visio stentles for zyxel switchs

You're joke, these are png files, not vvs.

I read the articles like this:

ZyXEL makes preparing network projects even easier!ZyXEL announces an expansion of the scope of support provided to technical specialists. Now at your service is a library of network elements (stencils), made in Microsoft Visio format and containing schematic images of almost the entire range of equipment manufactured by the company - from carrier-class devices, IP DSLAM and Ethernet switches, to Internet centers, DSL and analog modems and even some discontinued products. In total, the set includes more than 100 templates, combined into 13 groups corresponding to different types of users and telecom operators working with the company's products will be able to use the ZyXEL library of network elements for the Microsoft Visio package when documenting networks….

Where to get vvs files ?