The dimethicone suitable emulsifiers I know of (BTMS, behentrimonium, cetrimonium) are cationic, thus incompatible with the anionic SLES.
This patent mentions using ethylene glycol stearates to suspend silicones
More preferred are the ethylene glycol stearates, both mono and distearate, but particularly the distearate containing less than about 7% of the mono stearate.
Can you use pearlizers to suspend dimethicone? This is new to me.