Gibbed save editor saved my butt on BL2 before i got lifetime here on CH's. That editor is great, not taking anything from CH's.
Please use the trainer option request system for requesting new options be added to this trainer and/or vote on options already requested.
While waiting for an update to be released, you can use our free CoSMOS Gamehacking Tool to easily hack the game yourself. We have tons of video tutorials available for even those with no prior experience with memory scanners or gamehacking tools.
Someone posted several pages before that increasing backpack slots also increase bank slots. Did you tried it?