Okay so I was looking through curly products and here are some suggestions:

Ouidad has a Kurly Kids hair set (includes a light gel, conditioner etc.)
or you could use a low-poo/cowash for her and try using Carol's Daughter hair milk for her- they have a light version and the original- I heard its very good and looking at her hair it sounds absolutely perfect! If your in need of hair washing/care products I would reccomend the Ouidad stuff.

Also why not try a vinegar rinse?
*Current Routine*
LP: SM RSB
CO/CW: CJ Daily Fix, GR Restorative, SM RSB, SM SFC
DC: SM, CJ Rehab, G.Nutrafix, DIY
LI: a CO, KCKT
Sealers: an oil, JC N&S
Stylers: just CO, CJ CIAB, KCCC, aloe gel, FSG
Once in a while: ACV, Lemon-Aid

Oils to seal, rinse, and/or pre-poo as needed

2c/3a/3b coarse, normal porosity
CG since 2007