This needs a drop.

Classified ads at the time of posting:

http://m.imgur.com/SQqGnmU

http://backpack.tf/classifieds?item=Fancy+Dress+Uniform&quality=11&tradable=1&craftable=1&australium=-1

1*2.56 keys

1*2.67 keys (Painted white)

3*2.94 keys (1 has assists part)

5*3 keys (2 are painted white, 1 is painted orange, one has die job and one has spectral spectrum)

Unsolds at 3 keys:

http://www.tf2outpost.com/trade/27651186 (Has Spectral Spectrum, ~2 months)

http://www.tf2outpost.com/trade/27966643 (Painted white, ~5 days, poorly bumped)

Unsold at 2 keys and 17 refined (~2.95 keys):

http://www.tf2outpost.com/trade/27965435 (~5 days)

Seller at 2.9 keys:

http://www.tf2outpost.com/trade/27767250 (Has another in his backpack, painted after eight, ~1 month old)

This is all I could find on Outpost that are valid at the time of posting this suggestion.