Dats are easy.... Go to the lazarus homepage and check out the utilities. Izrahams dat maker is great and will make a dat for you. Now cats on the other hand are a tad more difficult. You'll have to make em. My fe makes a blank catver for you to fill out. I'm not sure about mamewah, but regardless I can help you get a template if you are interested in doing some work and making some catvers for everyone.
I plan on dedicating part of the lazarus homepage to making places available for people to post such support files.