I have been shooting a Sig P226ST for five years and just switched to the 5906. I bought it used and it came with the Hogue rubber grips. I shot an IDPA match and had a little difficulty on mag changes both reaching the mag release and the slide release. I never did this before with my Sig but I used my left thumb to release the slide. That may solve that problem but I an still interested in the stock plastic grips, preferably with the straight backstrap. Is this available? I did not see them on the S&W website. Also, I think I have seen pictures on this forum of an extended mag release. Can someone help with the availability of this part. Thanks.