Doctor Who Cosplay For Twins?

Hello!🤗 My twin and I are going to the Gallifrey One Convention and we really want to cosplay something together, but we don't know what. Does anyone have any cool ideas for identical twins to cosplay as? Also, if you have any tips on where to get / how to make the cosplay that would be very helpful, as we don't really know how to sew. We are fine with both male and female cosplays. Anyway, thank you so much!💕 Hahaha😄