I doubt quality coilover brands like Ohlins, KW, Bilstein even bothered to do the City. Tein perhaps. The FlexZs are EDFC compatible. Check the local Tein dealer, Riken Motor Sales on City-specific products.
On springs, Swift does quality ones, even custom. Eibach(prokit over sportline), H&R, Tanabe, Tein(HTech, not STech) are good options. Check the respective F/R spring rates & drop to set your expectations. A mild drop & rates close to OE won't hurt.
If you opt air, make sure you set your alignment at the height you intend to constantly run. Ignoring this will compromise tire & suspension life.

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