Help please

Hi all ,
looking for some advice on how I source some OEM ( or at least the same ride height) springs and shocks for my 93 Rivage , really don't want to stray to far from the original ride height as the only thing that's not factory fitted is the Radio/aerial so would prefer to keep her as close to original as possible (next year is our silver anniversary so looking to treat the old girl )

Regards  .

Mark O