is it possible to size a layout that matches the exact size of an object/container for export purposes (say 468x60 pixels)

I'm wanting to do some graphic style layouts. Printing them limits you to the inherent dimensions available on your printer, but exporting them as PDF and then editing them further there is a distinct option. ANd I am more interested in keeping them in teh digital realm than in printing them to paper.

Any way to export the results in the desired size?

 

Not sure what your question is. Both printing and saving records as PDF use the page size selected in Page Setup.  You can select a custom page size (at least on a Mac you can), if you want.