Interesting pictures. I wonder now if Humber used regular Raleigh type forks and different chain rings as well as those made famous by Humber at times?

Here are two more sources for decals. You may have to contact them as Humber decals are not listed in their current stock lists.

http://www.velocals.com/servlet/StoreFront

http://stores.ebay.com/Cyclomondo

So, what are your plans; clean up or total restoration?