Per Bob Ohlsson. a world class AE, you can get a similar tone to the U87 out of a Beyer M88 dynamic microphone. IMHO I thought the M88 had a brighter top end, so it would need to be EQ'd somewhat to get it closer.
As far CLOSELY matching a real U47 or U87, buying another manufacturer's attempt at cloning one (even a Telefunken!) will never totally match one.
Also, there are few pristine U47's around anymore BTW.
Supposedly, by judicious EQing/placement, a Shure SM7 will have SOME of the characteristics of a U47.
It doesn't sound like a U47 or U87, but for around $500 in a LDC, I'm a fan of the Studio Projects T3.
Chris