Server Recovery method
AIX has mksysb
HP has make_recovery
Solaris has Flash archive (ok it isn't very good but still)
Redhat has ... freeware applications that attempt to cover the above requirements. Baremetal, etc.
Why not provide a fully supported product, one that comes with the OS. Save to ISO image and then let the user handle it from there.
Just seems like a big hole that shouldn't be that hard to fill.