Baler pickup bands

I'm guessing that's what they are called, my NH648 has a couple bent pickup bands that won't stay on and cause the fingers to rub and they get bent also...

 

I did a little searching and mr google showed me the bands made from "poly" plastic type, they are around 30$ each vs the metal ones @ 40$ each...

 

I only need a few...

 

Has anyone used the poly type, are they really as good as the makers say they are??

 

Would you recommend staying with metal or the poly/plastic type?

 

Thanks, Chris

Baler pickup bands