sorry for the delay – I didt see that you responded so I went and deleted the links I found
not sure how it happened now –
I found this inserters in a post I hadn’t looked at:
<iframe src="http://rcm-na.amazon-adsystem.com/e/cm?t=michaelsoaries-20&o=1&p=48&l=ur1&category=kindlerotating&f=ifr" width="728" height="90" scrolling="no" border="0" marginwidth="0" style="border:none;" frameborder="0"></iframe>
it adds this to the amazon product: 
thanks
Michael