You don't really need a zipper foot, you can make zippers with a welt foot or presser foot with no problem. I don't even own a zipper foot. The only other feet you need are single right feet. This gives you a foot that has nothing to the left side of it. If you sew on "J" channel, it is invaluable. There are single right feet, and single right upturn feet.
The only rule of thumb is that the thread needs to easily go through the eye of the needle. If it does, it will work for that size thread.
Size 92 thread you can use a size 18 needle and up to size 24.
Size 138 thread you will need about a size 20 needle up to size 24.
Here are the feet that I use. From left to right, 1/4" welt foot, presser foot, double welt foot, 3/4" welt foot (to make windlace with 1/2" sponge rod) 5/8" welt foot (to make windlace with 3/8" sponge rod) single right foot, and single right upturn foot.
Here is a thread that shows how to sew a zipper with a welt foot or presser foot. Go to post #14. CLICK HERE