We're in a 21 year old house and when we moved in there was a drain pipe through the wall for a garage sink. Initially there was a short piece of pipe sticking through the wall with a cap on it that stuck out a couple of inches. While moving things around that section broke off flush with the wall. This end of the pipe is a wye that goes up into the wall for a vent (I think). All I want to do is cap this off as close or flush to the wall as possible. I've tried to find various PVC parts but they don't make one that is 1-1/2 inch OD, at least not at the big box stores. Any ideas? Am I overthinking this? I'd rather not chip away at the cinderblock if I can help it. It looks like they cut or smashed the cinderblock then tried to fill the gap with concrete or mortar.

