Yeah, they are available...
But you don't want to know how much those rear ones cost!
Believe me, it's nuts!
You'll do just as well cutting about 1.5 inches of thick hose, slicing it length-wise, and grinding about half the thickness off for half of it's circumference. Another way to say it is: leave it full thickness where the tank rests on it, then about half thickness on the sides.
It also needs to be cut at an angle - maybe a 45 - you'll get the idea real quick once you know where they go.