Buy another door lock for your door, it is just a matter of time before it breaks, and buy an extra one for a spare. I was told by a lock smith and camper world there is not a brass or stainless one made.
I bought a different brand after getting locked out.....
Well I couldn't find the video from TrailerLifeTv as the blog is no longer available and the video is not on youtube anymore. But I did find this picture (video would not play through this link either) that shows the size of the foam used https://www.facebook.com/TheGoodSamC...52796892127803