I saw The RV Geeks took a paint stick (from the hardware store) and cut it into "biscuits." They could cut that paint stick into six or eight biscuits? Then take the many "biscuits" to the jack. Extend the jack a bit. Shove the "biscuits" into the springs. That way the springs won't "spring" back. The bent plate can then be removed for fixing the bent part. Sounds a lot worse here than their video shows. thervgeeks.com You'll have to do a search.
Oh, and to remove the biscuits just put the springs back on the plate, extend the jack a bit more, and the biscuits will fall out. Or I suspect I'd have to pull them out with my fingers. Pretty slick.
No, I haven't tried this.
Bill, NA8M