5.29s for sale in Russia are standard 9" rear and small 7.25" front (won't fit ARB). Those are readily available from multiple sources.
It's that elusive MB241981 (8" 5.29) that everyone is chasing after. At $30 I can't phantom how it can be done. Price for experiment is cheap but if it looses it's teeth somewhere on Rubicon cost of recovery might quite offset it.

92 SR, 285/75R16 Yoko MT ARB locker GAST compressor AirLift 1000 MM10500 Snorkel custom rear bumper
02 Montero LS died protecting the master
08 PowerWagon (stock!)