Shell shortcuts for basedir flag

I see that #1027 implements --basedir query option with which I'm able to query only sub directories of a directory. Like the z and zi shell functions, is there zc and zci shell functions with basedir as PWD? If not can this be implemented too? (maybe zb or zd and it's interactive version for search in a custom basedir too) It should be easy, just adding few new functions to the templates