Might just make do with a custom for display purposes 
I think that's gonna be the route that I take as well, since I'd like to do "carded" and "loose" of all unique figures. I can handle that with the $75 Droids figures probably, but at $300+, there's no way I'm buying an extra black Sandtrooper to open...
I just pray that they don't make any other rare carded figures that are more unique than the two they've already done (same Fett, easily customized Sandtrooper).