2 cariactures for software programme

i need 2 cariactures that have a hand drawn appeal. One needs to be a male dachshund and the other needs to be a scruffy female tabby... the more fun, instantly identifiable and cute(ish) the better. These will be cariactures that, if the products is successful, will be recomissioned to the winning artists for further work. These will be entered into the papercraft industry and distributed on CD software. I will need 6 scenarios including both cariactures to a specified script.
Im looking for ai, eps, png and/or psd files. I will need them in black and white ....... please :)