if you are reapplying you cant be expected to get a whole new batch of lors. you can use all of your old ones, and maybe supplement one or two (in your case you already have since being on the waitlist). there hasnt been too much time elapse since your waitlist, so i dont think they would expect much. just look for more potentials and send in whatever you got so it is apparent to them that you are continually trying to improve your file. you may also want into improving the other more weighty things that they look at (mcat or gpa if applicable), as those make the biggest difference when it comes to decision time whether they admit it or not.