The Air Force website has a HUGE selection of current photos:
http://www.af.mil/photos/
Do a search for the planes you want. Put it B-52 and you get this selection:
http://www.af.mil/photos/index.asp?galleryID=15
The Monogram kit is a B-52D. To make a current B-52H you'd have to replace the tall tail with the shortened tail, and replace the engines with the H's different-shped nacelles. The tail gun has to go, replaced with a selection of radomes, the nose has to have the chin pods added, and there are about a billion new EW antennae all over the airplane. You may as well just build it as a Nam-era D.
If you want a current B-52D, AMtech is about to release on in 1/72, probably based on the discontinued AMT kit. Available from Squadron for preorder:
http://www.squadron.com/ItemDetails.asp?item=AT729207
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