Crisis averted. A couple of 2.4 Goodyear Newton ST were delivered from MTBDirect and fitted front and rear. They measure out at around 2.25", but seem grippy enough, roll pretty good and look sweet. So I'll keep running them for now. Also noticed they'd gone back up in price. No longer $60 an end.
My half worn Griffus I'll keep as backups in case of slash/unsealable puncture. I do like those tyres.
Also grabbed a Magic Mary / Hans Dampf gravity casing combo from bikebug, which is now sitting in the spares box for future use.
Will be keeping an eye out for some Wild Enduros to try, so hit me up if you see any 29" WE for decent prices.