Stuart,
Add this to the recipe, I did this with my PR this year.
Of course, I didn't need the oven method, since I had the new FE/CS to finish it off
Take the ribs after cooking, trim the good meat off. Toss them in a pan with a couple of cups of beef stock. Bring to a high simmer. Then give the ribs time to melt away into the stock. After I pulled the ribs out, I added a cup of good red wine.
Made a wonderful Au Jus for the Prime rib.