Teeshirt designs

hi, i do vinyl graphics here in Bradford West Yorkshire. and would like to move into teeshirt printing for stag & hen parties, but i need somebody to do the designs. i would like maybe 12 stage designs and 12 hen party designs doing which could be uploaded onto my website but i would also need to print these designs, and either photoshop, coreldraw or illustrator file formats would be needed.the designs would need to be something along these lines http://www.henandstagshirts.co.uk/ and this work will be ongoing.

Regards
Phil