For anyone wondering if suction style safety grips work.....they do.
We had a small bar (a rod like thing) built into the shower surrounds but the fitting broke. The surround is panel type and not appropriate for screwing the usual sort of safety grips.
I'd seen some suction types in Lawtons and advertised on Home Depot. Like this.
They come in different sizes, they can fit on the panelling or the bath and they do work.