I came across these T-shirts from FieldSupply thought they were pretty dang cool. Gonna order a few for myself too they start out around $6 ea.
http://www.fieldsupply.com/general-...shirt-deals.html?limit=60&avad=48247_f888ad3e
http://www.fieldsupply.com/general-...shirt-deals.html?limit=60&avad=48247_f888ad3e