Polar Heart Rate Sports Bra

So I have been having problems with my chest strap for my Polar Heart Rate Monitors. I realize that it is my sports bra that is disrupting the monitor but I haven't been able to find one that doesn't disrupt it at all. Usually it's fine if I am just doing straight cardio such as running or using the elliptical. However, I do boot camp for my primary source of calorie burn. The variety of exercises such as plyometrics and sometimes getting up and down off the floor disrupts the sensors.

I just found that Polar makes a sports bra with a built in sensor strap and you fasten on your transmitter that came with your strap. I was wondering if anyone has one of these and how they work for them.

I also am wondering if anyone has found a sports bra that doesn't disrupt their sensor. Any help would be appreciated. :)