As far as I know, the Galveston and Providence conversions were done off Cleveland hulls (markedly different than the Baltimore). I drew the Cleveland class quite some time ago so the hull is there if you guys want to draw the missile cruiser refits.
I know that Thiel (?) started the CGN-11 Chicago but has never finished it. I am, however keenly interested in both the post1945 Los Angeles and Helena, so maybe, with your permission, Colo? Okie' been made though w/o ships boats, so can be converted to Little Rock. Hull can also be used to do Springfield and Providence, though Galveston and Topeka are little trickier. But I sure wouldn't mind a go at them also...
You are free to convert any of these ships to whatever you want. All I'm planning on doing is to draw the 1944 refit, and possibly the Oregon City after that, but this is all dependent on whether or not I get swamped with schoolwork in the next few days...
e: I may also just suck it up and convert the late-war Brooklyn to the Belgrano... seems a lot of folks get a kick out of saying they're going to draw Belgrano and then they don't actually do it.