Hi Zotzman, try this website, it contains hundreds of Solidworks models of various different parts; www.3dcontentcentral.com
I know of several both free and paid. Depends on how much detail you would like, and if you are willing to pay for it. And/or I could model one for you.
As per your queries I would like to suggest you visit - http://www.3dvia.com/warehouse/all where you can download Solidworks model for a presentation
Here's another - http://www.tracepartsonline.net/(S(ycuotvozowjhrmilewzekfrb))/content.aspx also free. There is an opportunity to get a lot of formats - not just SolidWorks Registration is required.
https://grabcad.com/ is also a really great resource. You can specify the type of model (file format etc.) that you want too.