Product review (2 stars): Worth $13 from Amazon, but stay away from Lowe's
I bought one from Lowe's, where I bought my washer.  Did not buy a dryer, old one is fine.  Tricky business mounting a 13 year old dryer atop a new 4.1 cu ft duet.  Lowe's appliance personnel was no help, offered no advice, even though I told her three times that I wished to stack my old dryer on my new washer- not a word, just shrugged and said, I bet it'll work.  Installation personnel (3PD company) was even worse (admittedly, there was no delivery or installation charge). After making another separate trip to Lowe's and then finding that the kit didn't work, I and a pal rummaged around for some double sided foam tape and a few odd cabinetry brackets; dug up some self tapping screws and we're good to go.

Not a normal situation that many people are liable to run into, but still not too hard to solve once we engaged some thought and effort.  Amazon has a darn good price at $12.27, while Lowe's wants 25 bucks (I'm returning mine tomorrow).
As others have mentioned, one can get cushions and hardware and screws for a few bucks (probably laying around your garage!), and figure it out for yourselves, if you're cheap like me.
If not, buy both items new and hire the whole job done- easier.