Mod rewrite all wordpress pages ?

I have my wordpress site up from few months now, The permalinks now are
awpsite.com/category/a-post-title.html which I am going to change to awpsite.com/category/a-post-title-1234.html .

Now, I once I do that, am left with all the previous posts links changed to new one, which leaves many of the incoming links to go to 404 pages. Is there anyway to bulk 301 redirect the previous links to new ones in .htaccess ?

Or anyway to give me a list so that I can copy pase the links to my .htacess 🙂