I have a Napa Balkamp undersize that is .914 or so. I'm putting a 72 440 that was out of a New Yorker into my 67 Coronet with a 383 and a 4 speed and this was what I needed. I bought it years ago, and I know they are no longer available thru Napa. That .880 sounds pretty small. I saw on Ebay a while back that someone had the .914 bushings. Might want to check your OD of what you need.
