Hi CZ,
You are correct that some of the line cards on that stencil do not fit properly into the chassis. Those icons/shapes were produced by the previous vendor prior to 2009 when we took this over. The shapes produced by my group do fit correctly, for example the WS-X4748-RJ45-E. The product group did not authorize us to go back to retrofit the older shapes and that's why they do not fit as expected.
Regarding missing shapes, we produce what the product group orders from us but I can often ask them to fund additional shapes when there is a forum request. Please understand that they will not accept requests for end of life products.
Brett Newman
Cisco Visio Development
www.shapesource.com