Yes, the bike is an 08 Raleigh Detour Deluxe. I ordered it as soon as the 08' lineup hit Raleigh's web page but I had to wait several months for it to be built and shipped. I love it.

The boxes do come with lids but I haven't needed them yet because although I like to bike, i own a car and generally use it in the rain. Because the boxes are almost completely square (rectangular) it would be easy to make an 'after market' lid for them out of wood/plastic/metal/anything.

Personally, I have a top secret technique for making custom container lids:
Stretching fabric, preferably fleece, over the top of the container.
Securing it with a large rubber band*.
Coating it in polyester fiberglass resin**.
Then trimming it to size once it's dry.
***

*balloon animal balloons ($0.50 USD in the toy aisle of your local grocery store) work great to make big rubber bands for stretching fabric to make lids, just tie them end to end as many as you need for the size of your container.

**FG resin does not stick to plastic so once dry it'll pop right off. OTOH if your container is anything but plastic, you MUST mask it off with aluminum foil and tape or the lid will be irrevocably sealed to the container.

*** for those of you unfamiliar with fiberglass resin, you can get a small can of it for about $11 @ Walmart in the automotive section. I HIGHLY recommend picking up an extra tube of hardener (about $1.50 also @ Walmart) because you often run out of hardener before you run out of resin. If you've never used the stuff before I suggest you read the warning labels on the back of the packaging and wear proper safety equipment.

EDIT: (adding more info)

When i began to look at containers to use I knew i wanted something plastic or plastic-esque so it would be lightweight and workable. I looked at small trashcans, buckets, battery boxes, rubbermaid totes, I even looked at making my own containers from fiberglass. I chose battery boxes becasue they had reinforcing ridges on the bottoms, were about the size/shape i wanted, and were readily available. The black ABS plastic is also MUCH easier to drill than brittle plastic used in many buckets/totes. I got mine from Wal-Mart for about $7 a piece. I am working on a new design using 2 small trashcans that mount independently and that can be modified with inserts to perform one specific funtion (right now I'm looking at a pannier that will chill a bottle of (room temperature) wine by the time I ride home from the liquer store. (in TN you have to go to a liquer store to buy wine)

I'd love to see other people take this design and modify it or change it completely to solve their luggage needs. The bungee mounts have worked swimmingly.