Hi Don:
I assume that you are referring to the door latch striker spring which to the best of my knowledge is not available in reproduction form. You might be able to find a generic spring that will work or perhaps pirate one from a spare latch assembly. Sorry that I can't be of more help.
A400 Guy
That is the same as 33-34.Available from Bob Drake. Couldn't readily put my hands on his catalogue.They are not as good as the originals. You may find one at a flea market. Watch for vendors with spring assortments.