Felis is right though - most, if not all, the 'modern' tabard-type armour sets, including those given by GCs, either have a silly looking breastplate over the chest and shoulder pauldrons (as seen in this 1.0 MRD render pic), or are actually a 'chainmail' type armour which uses the same tabard model but has a suit of chain underneath, including long arm sleeves of chainmail.

Sadly the only 'real' tabard gear remaining is dated/weathered tabards from version 1.0 which is no longer attainable. I've kept my old tabards from 1.0 for this reason and I wear them occasionally myself as vanity gear, even though the colouring is bland as anything.