Regarding the CW80, I have found there are many for sale on Amazon, Ebay, and at Hobbyspeed. Came across a review of the CW80 on Amazon:
https://www.amazon.com/Lionel-...6#reviews-filter-bar
that states:
'Long story short I figured out that there are basically 2 versions of this product, the first design has a date code before 2006 and most of those have problems, the one I had was the later one having a date code after 2006 and these will have a 'G' in the date code. These later ones are the good ones that have been redesigned. Well mine wasn't working correctly right out of the box. So I think they still have some design issues with these.'
Mine, from Ebay in a brown box with a green sticker and date code of G and year of 2011, works OK even after several derailment shorts and no injury to my Legacy loco.