Saw these on ebay, and caught my interest.
An adapter for your high-lift jack that hooks onto rim spokes as the point of contact with your rig. Possibly a bit easier to reach in some situations, especially on rigs with side skirts & alloy steps, etc. But because you're jacking the wheel, not the chassis, you'd have suspension sag working against you, and possibly making the job a lot more dangerous. Not to mention the possibility the adapter might scar your rims. Not sure I see these being useful at all.
http://www.ebay.com.au/itm/HI-LIFT-JACK-MATE-WHEEL-LIFTER-4X4-4WD-LIFT-HIGH-LIFT-HIGH-LIFT-HI-LIFT-RECOVERY-/250957626658?pt=AU_Car_Parts_Accessories&hash=item3a6e3d7d22