T-Shirt designs, cycling to start with, also to have a original slogan for each!

Hi All, My company is in the process of setting up an Amazon shop to sell printed and embroidered t-shirt / polo shirts. What I'm looking for is someone to come up with original slogans and logos for our range of shirt, we have enclosed a sample that we have come up with to show the kind of thing we are looking for it will be solid lined drawing one colour. We are looking for 12 cycling related design to start with I would expect about 20 off designs to pick 12 from that we will use !! these will be printed onto t-shirt in one colour, we will be wanting more sports done in the near future. Can I stress, designs must be original, Must be original.