Double vanity sink, which fitting?

[Gene.m]

I am trying to figure out which fitting is correct for two vanity sinks about 6 feet apart in a bathroom. I see allot of back to back fittings online but I can't find any locally. Illinois plumbing code had an entry for back to back fittings but it was repealed. Any help would be greatly appreciated.

 

[Cacher_Chick]

What you are looking for is commonly called a double fixture fitting. You could also use a double wye or double combo IF you re-vent the individual traps.