Do you have to order them as customs or something?
i had a look at the bareknuckle site and you have some colour options but you cant choose to zebra them with like blue and pink or something equally as daft.
I may be putting together a disgusting (amazing) looking RG
DiMarzio are your best option. Banjomikez will (I believe) put together whatever combo you like.
Someone will probably mention bobbin toppers as well, but they're just stickers, and both times I've tried them they haven't held up for more than a month or so (and never really look that good to begin with).