This page lists the manufacturers that are carried. If there is one not listed, let me know and I may add it to the list.  Access is available for all of the strings by any maker, so if you want to make a special order, that can be done. 

The next page will list all the strings that are kept in stock. Click on any set and the next page will give a description, as well as order information for the cart. 

Some guitarists will change their individual trebles strings (1-3) many times for each change of the bass set (4-6), which is why the full set (1-6) as well as the individual treble strings (1-3) are listed.