The handicap grab bars available at the local big box store, Lowes, are oddly sized for retro fitting to existing construction. Instead of being in multiples of 16" for attachment to studs using the standard spacing, they are in odd sizes e.g. 42".
Similarly, when I look online for a grab bar "system" for the tub/shower the attachment points are not located to align with the studs. Email with mfgs says that they are for "new" construction, or for when I've ripped out the dry wall and added some blocking.
I can get by with "WingIts" behind the drywall but I'd much rather secure to the studs if I could.
Is there any grab bar mfg who caters to retro fitting bath areas without remodelling?