Unfortunately, there is no standalone avatar campaign at the moment.
All avatar campaigns require to use the signature code.
I am selling my avatar space on weekly basis for 0.01 btc.Interested member pm me or post here.The avatar should conform with bitcointalk.org forum policies related to avatar
you can find a lot of good deals for avatars here:
https://bitcointalk.org/index.php?topic=1087042.0