Hurrah, there are still airlines that provide Jepps on the flightdeck!
Where I work, it is a mix of pilots supplying thier own for domestic work and the company on loading nav bags with whats required for international sectors.
I am not a fan of being forced to supply my own Jepps (it was in the contract when I joined) but trying to work with Jepps that poorly kept, pages with the holes torn out, put back in the wrong order ir missing altogether, hand written notes on plates, charts folded up incorrectly so you cant see which one it is..........just sh1ts me to tears.
Atleast with my own set, plates are clean, plastic protectors used, updated correctly and so on, clear hole reinforcers used where required etc etc. Much like each mechanic has his own tools, a pilot should have a well equiped nav bag!
A previous employer of mine used a contractor. Came in on a turnaround with a big trolley and swapped out the whole ships library.