I figured it was too small for Shapeways. And the Bowser stuff is "n.a.".
I have some etched brass antennae I bought from BLI right after they brought out their E7 (first loco they did). I still mean to put them on my PRR E units. But these are flat metal, look funny. I wanted something that looked more 3D, so I used the antenna stanchions from a KATO car. Brass wire antenna for now, maybe I'll get a thicker one to fit tight in the stanchions.
I'm going to sell this loco soon, and I was wondering about adding the coil box. But the only guys on eBay that would notice its absence are you SPFs from TRW.