Wanted: Bottom bracket sleeve for Dura-Ace 7400 112mm

[eric.zamir]

So... my 1986 Panasonic Team America frame was fatally damaged, and I'm rebuilding the Dura-Ace 7400 group onto a similar-vintage Faggin frame. I've had to replace the bottom bracket, which is a different diameter and threading (112mm Italian). I found one on eBay, but they sent it without the protective black sleeve/enclosure.
Any ideas where I could snag one of those sleeves?
Thanks!