Hi Rebecca,
Most companies make a canvas type paper to be used with oils. I have tried several and like the one made by Canson. I am not sure how it would respond to alla prima painting, but it works well with underpainting and glaze. For an example of my results, see "Grandma's Blanket" at
http://forum.portraitartist.com/show...=&threadid=874 in the critique section. This picture is lighter in tone than it appears on your monitor.