Blanton's. Not sure if you would call the bottle antique, but it is certainly unique. You should be able to find it at most liquor stores. Drink Up New York has some hand selected bottles available for sale. Blanton's is exceptional bourbon to begin with, having their experts select a few barrels guarantees some killer whiskey.
http://www.drinkupny.com/Blantons_Origi ... /s0530.htmThey still have some of this years Parker's Heritage left. I have not tried this one so I cannot comment on it's qualitiy.
http://www.drinkupny.com/Parker_s_Herit ... /s1398.htmAnother suggestion would be Rock Hill Farms. Another somewhat unique bottle and a stellar whiskey.
I like Mike's (bourbonv) suggestion. An antique decanter would be really cool. I personaly would fill it with Rare Breed, but that's just me.
Congratulations to both of you,
Randy