1977 Olds Omega springs

[el-camino]

hi all,
my wifes "new" Olds Omega from 1977 needs a little pimp
i search now for new leaf springs rear and coil springs in the front.
but all, Hotchkis, PST and so on, have no Olds Omega in their lists.
i think, the leaf springs are the same as Firebird or Camaro.
in the front fits the springs from the Nova´s ?
is this right ?
any ideas welcome