Who makes an IWB holster for an American Derringer model one?

I checked with Ryan (Countryboy) and he doesn't have the mold.

I do have an OWB holster that came with the pistol when I purchased it decades ago.

I am lookin for carry options as this makes a great belly gun, but I find I don't wear suits often so need IWB or pocket carry for this beauty. Yes it is only two shots, but is good for giving me time to draw another pistol.