Swayz
Seaman, Heights, Rural have JH wrestling. Don't know about 501 district.
You're right about lots of districts not having JH programs, but I would say that Wichita area has stronger and better tradition for their kids programs than Baldwin, which helps when some don't have JH wrestling.
I am just always impressed with the HS program that Kit Harris has, many of which do not come from the kids program.