It just depends if you're willing to risk your $36. As soon as you hit it with the heat gun, you won't be able to return them.
My suggestion would be to stick them in the oven at about 250 deg for 10 minutes. When you pull them out, you'll be able to tell if the plastic will be soft enough to 'adjust' without cracking or deforming the hollow bars.
It looks to me that unfortunately the way that they are molded, the bars will deform (sorta like trying to bend a metal channel - when you bend it, one of the sides will start collapsing).
BLUF: I'm sure it can be done ... just not sure how difficult it will be.