As I posted yesterday, you can use OpenOffice.org with most of the templates out there. Writer/Word, Calc/Excel, and Impress/Powerpoint. Also remember that OpenOffice opens .docx files without any extra help.
So google away, find your Word or Excel template, download it, and follow the steps in yesterday's post to save it in OpenOffice template format in your own template collection. Here's one of many sites. http://www.docstoc.com/
Here's the only difference: it's after you've saved it. Instead of being able to access it the way you do with Impress, you choose File > New > Templates and Documents to get it.
Then you'll see a window with all your templates. It might be in a folder of templates like My Templates or it might be at the top of all your folders. You can tell by the info in the title bar. The template will be in the folder you picked when you chose File > Templates > Save. Then just double-click and you're good.