Cartoonist required...

We are looking for someone to design a simple wedding invitation, with a twist. If its possible we would like the invites and total stationery range to have the same two "characters" on them.
It's these characters that we would like you to come up with, the groom to be a sheep and the bride to be a horse (stop laughing) we were thinking standing, linked "arms" and if its possible the groom to maybe have a kilt and the bride to maybe have a veil/head dress.
We are on a budget, and we would ideally want to use the cartoon or image created to make our own invitations, place cards, order of service etc!