That's a noble venture, but those parts may be very hard to find. The Ideal is a rare lantern in the first place and you need the reflector housing and handle assembly as well as the rare-size 4" reflector. I don't know of any inspector lantern so different, it uses the odd size Vesta railroad globe and is probably the only inspector lamp with a bail keeper, a feature usually associated with dash lamps. I too have one that needs the 4" reflector, so I'll be looking right along with you.