Had one, sold it. Didn’t like the sweaty back it gave me and found that it was actually not that roomy if you wanted to carry a decent amount of water (along with tools, pump, tubes, spare layers, snacks, one man tent, emergency fire lighting kit, VHF radio handset and full set of OS maps for nipping to the shops in the STW tradition).
Deuter and Vaude are the places I’d look as well. But the Camelbak bladder is good though, and a guy I ride with now & again still has my ~5 yo Mule and it’s still going strong so it’s not going to fall apart on you. He even stuck it through the washing machine so it’s shiny & bright again too.