Welcome to BYC ...I wouldn't think Rocks would be too hard find. I know we have a couple chicken enablers here somewhere.
Ya think?!
My mom has some barred Rocks she bought from a guy who advertises heavily on CL that he has pure bred chicks, very cheap. Nice temperament but obvious mixes and one of 4 has a severe wry tail (she needs frequent attention to her backside or she builds up a manure ball). I wouldn't get Rocks there (although his Brahmas are pretty!)