The funny thing about a daily drifter, is that you tend to daily much more than you drift. So unless you like clunking/juddering/jumping around parking lots while everyone wonders what's wrong with your car, an LSD is probably the way to go. Plus, they just drive nice. Real nice.
KAAZ Diff: https://kaazusa.com/product/lexus-altezza-is200-2-way/ Part# SAT2090
2x Lexus part # 90311-43009: Axle seals
2x Lexus part # 90366-50001: Bearings