get_sidebar($name); // arg $name is sidebar-"name".php

the function will look for sidebar-single.php (inside theme dir) and load it if exists otherwise it will load the default sidebar.php.

you can include section base sidebar base on wordpress hierarchical order. below is just a simple example (need to tweak it base on which section came first thought)

if (is_single()){
get_sidebar('single'); // include /theme/sidebar-single.php
} elseif (is_archive()){
get_sidebar('archive'); // include /theme/sidebar-archive.php
} else {
get_sidebar();
}