I've built the Monogram 1/48, the Revell 1/48 and the Airfix 1/72 LM's. They all need a lot of extra work to bring 'em up to speed. One has scratch built details ... and I've used New Ware's aftermarket set to really bring one to award winning status. It's even on New Ware's site as an example of a finished model.
But one thing I'd recommend is this site. For reference ...
http://www.hq.nasa.gov/alsj/frame.html
It literally has every photo taken on the lunar missions. You can see the LMs in various stages of construction, and on the moon. If you want to at least be aware of how it looked on the moon, this site is indispensable! Alas, I've spent many an hour viewing these pix. Go to the mission of your choice, navigate thru till you see a list on the left, and click on Image Library. There's usually a Thumbnail of all the photos in the 'Magazine', click to enlarge, make a note of the photo number and you're off to the races!
Hope this helps
Pete