Colville's Custom Tackle has Amundson fly boxes in and I can tell you they are very nice!!!
The boxes are just like the C&F Design waterproof with slit foam and the seal around the top, They come in three sizes small $5.59, med $7.59, lg $16.99. as you can see the price is about half of what the C&F boxes come in as, the store has a very good supply of them in so hurry, as with anything that works it will go fast.