learn it by ear. you'll be so much better off by doing this, you don't even know. if you've got the chops to play alexi's stuff, just take your time with it and do it old school.
next time, don't ask the forum where the majority of the populace gets off by telling people to do the legwork themselves for tabs

but yeah, do the legwork yourself. the first one, or two, or thirty songs you do will be time consuming, stressful, hard, and annoying, but the more you do it, the better you get, and before long you'll be able to learn faster and better with your ears than someone else's tab.
modes are a social construct