I keep some old original springs just to use in case I find some that need to be replaced. Even though the number of coils is different, the spring should work OK, but I always like to use complete sets of matching parts. If nothing else, it makes the job look better.
Maybe it is just the picture but that spring is not made right. They should be ground flat on the top and bottom. It looks like the spring retainer is cocked.I would try a good Model A parts dealer, to get some good springs.
I agree with George.
Also look at the other springs because I can see in the picture that springs 4, 5, and 8 don't match the 4 intake springs in the picture.