This is my usual bodyscape lighting - either vertical for a standing body, or clamped to a crossbar between two stands for reclined bodies. (I used to use a boom, but I find they're just an an accident waiting to happen with the angles you need for this - the goal post is far more stable).
You can indeed do it with any softbox: what's happening when you turn the softbox away is that you are making the softbox thinner, from the subject's POV (ie imagine your eye at the point you are illuminating looking at the soft box - as you turn it, the front panel becomes thinner, until it vanishes). This means you can use any softbox as a strip, you just need to turn it until it's apparent width is the width you want. In practice you'll look at the width of the light you create on the subject as you turn it (assuming you have a modelling light). You can also move it forward to achieve the same thing (ie move the light towards the camera assuming your softbox is behind the subject facing towards camera and down - again the front panel will now appear thinner). We have actual strip boxes that are thinner to begin with, to avoid the side effects of turning a wider softbox: bounce off of nearby walls, floor, ceiling etc and flare directly back at the camera.
If you promise not to get offended by nipples (but then you are reading a thread about bodyscapes...), you can click this link for an example with a strip-box (and the whole portfolio and in fact the entire website is definitely "Not Safe For Work" - you'll need to click on the cog at the top and opt in to the dangerous and corrupting material
):-
http://purpleport.com/portfolio/scooter/image/2760487/photographer/?referrer=scooter