HK

Do you have replacement springs for thet VP9 20rd HK magazines?

Let's try this one to begin with and see if that's a good fit. HK changed the shape of the follower a year or two back, so if this one doesn't fit let me know and we'll get you the older (M&P-like) pattern.
 
 
If you KNOW you have the older followers (from the days when the 9mm mags were 15 rounders), this is the older pattern: