I have bought several IWB holsters since I bought my LC9. The one that I now use and love is the N8 squared tactical holster. I wear it all day and forget I have it on.
"Smartcarry" deep conceal it's not IWB but no one will ever know you're wearing your LC9 and I mean ever...no matter what you wear. Any other time it's Remora IWB for casual. W4M
Try an Old Faithful holster kit... you get the parts in a kit and put it together, takes about 25 minutes, very easy, and it only costs $39.
N82Tactical holsters are nice also.
Check The holster store.
Check StonerHolsters.com