After a good deal of experience with the maker and his products, I beleive it will be very difficult for you to find a better IWB holster for your 442/642 than the Slim XC made by TTGunleather. It rides as low as any I have used and it is extremely comfortable as well as functional. Tim makes this holster without reinforcement and it is not needed as it is contstructed with the rear (body) side flat and the outer side molded to the gun. This provides great comfort, great retention, and the holster does not collapse making insertion difficult. Tim does not recommend carrying the holster empty for long periods of time.
I have a few of these holsters for both semi autos and revolvers. I carry several J Frames regularly in mine. I had him make it to fit J frames with a 2 1/8" barrel and the shorter barreled models fit and work just fine in this holster. Tim is a great vendor, and his wait times are reasonable, although he is a bit behind now as result of his original shop being destroyed by a serious fire some time ago. I can recommend his work highly and he is a GREAT vendor. His IWB holsters are the only ones I personally have been able to use with satisfaction all day long every day. Website is TTGunleather.com .