Artwork for 3D mould - open to bidding

I am the owner of a promotional company. I have a client that wants a pen that has little things floating in liquid in the end. i have the pen manufacturer but I need to get 3D artwork so the manufacturer can make a mould to make the little floating things. There will be three items. Each item is only one colour. I have attached an image of an eaxmple of the plus images of the items that need to be made to go in the pen. I'm not sure what else you require.