Any tips on a very elegant, classy version? Approximately 36-42" high, which the client (a college grad) wants 30 guests to go "wow" over? Can be made mostly of styrofoam....would prefer to keep the icing buttercream? I'm pretty experienced, but need some guidance before I try this! Thanks!

ok...using the measurements of the real deal (found via google)

and a little basic math (scale, ratios)

at 42 inches tall -- the cake would be a rectangle 12.3 x 5.4.

that's one might slender and tall cake.

so...I do the base as the cake and then do the tower out of styrofoam.

I AGREE WITH DOUG, BY MAKING THE BOTTOM CAKE, IT WILL BE EASIER TO SERVE AND WON'T BE TOP HEAVY, I WOULD SKEWER IT LIKE CRAZY FORGET SKEWERING IT YOU'LL NEED SHARPENED DOWEL RODS,INTO A THICK BASE OF FOAM CORE