Trendy T-Shirts & Singlets for 13-25 yr old Male / Female - Australia

I'm looking for t-shirts & singlets that I will be using to sew on EL panels with another company in Shenzhen region.

I would like my company logo to be printed on inside collar label with size of garment
AND
Outside t-shirt behind the neck area as Heat Transfer colour print.

I'm looking for nice t-shirt option (v-neck option) for young male/female 12 - 25 yr old with expensive looking fabric. 100% cotton or Cotton mix with other material is okay

Also looking at SINGLETS for same purpose.

I will need t-shirt prepared and shipped to Shenzhen.

Conditions:  (Do not contact me if you cannot meet these conditions)

Payment : Paypal only  !

Shipment : Less than .50 cents per pcs to ship to Shenzhen.

Sample  : must be willing to provide sample to evaluate quality / product.

Packaging : Must be able to provide custom packaging for company logo / documentation