This is the part that I used and it bolted in just fine on our 2015 30DS. It just would be nice to have a cheaper alternative.
When ours failed, it would run for like 5 seconds while making loud clanking noise before the controller would stop supplying power to the motor. So if you help the stairs go in during that 5 seconds, it'll stow just fine. Then you'd just have to disconnect the motor from underneath to prevent it from turning on everytime the door opens. PIA getting in and out afterwards. Strap is used for extra security.
I've seen some web postings that say a Dorman 742-277 would fit from a 86' Ford Taurus, drivers side window. Would be nice to know if it does fit. $40 instead of $85+. And most autoparts stores would have lifetime warranty too.