I had Kevin Nightingale (Nightingale Leather) make his SparrowHawk:Pocket Holster for my Shield to carry in my right front pocket and I am very happy with it.
I've found that after trying a couple different punches for adding a Apex kit to my Shield and replacing a trigger in a Sig 938, the absolute best punch is a Starrett 1/16"/1.5mm "nail set" from Amazon.
My pick---again---Garrett Industries, Silent Thunder Appendix Carry is hard to beat in my book. I have one for a Sig P938 SAS and also a Sig P239 SAS. Going to order it even before my new Shield 9 arrives. Also, very nice people to work with.