Not a total answer but from this drawing in the part catalog here:
https://catalog3d.winnebagoind.com/2021/325203.htm
I find a "spring- gas" in the list and of entry door parts. I think that sounds close enough? I believe most of their measurements are in MM, so that "375 lg"would look near 14.75 inches? Rated 22 lb?
It does not show the location for this smallish part but there are no others on the entry door parts list, so I "feel" this is correct.
However, to be safe, one might do a Google search using that part number and possibly find a picture, etc that tells you more before commiting?
A quickie search seems to turn up lots of places who might have it, from Amazon to Wal-mart and many others who might pop up? Seems the -38 part changes things a lot?
Good luck on the chase!
__________________
Richard
Why no RV year, make and floorplan on MY signature as we suggest for others?
I currently DO NOT have one!