Storm Window Latches

A handy person from Baltimore, MD says:
I have storm windows that are held in open position with spring-loaded latches similar to your part number 91-001. Unfortunately, my latches seem to be more permanent. The latch and the spring seem to be one assembly and they seem to be held in place by stamping the frame itself (I hope this makes sense). Is there a way to replace the shot springs in these latches? If not, is replacement my only option? I have included a photo of the latch.

User submitted a photo of a window latch.
Profile picture of Paul
Paul from SWISCO responded:
Good afternoon! Thanks for posting. I'm not sure exactly what this corner is while it's still installed, but take a look at our 91-177 and let me know if you think this could be a match.
A quick learner says:
It looks right. I've ordered a set and I will try it out.
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