Tom You don't need to do it in the dark. The DUKA 10 or 50 will give quite a bright enough safe light to enable you to contact print with clear files and a sheet of glass. Alternatively the Paterson frame either 120 or 35mm will allow you to place a piece of paper into it in the total darkness to cover the negs. You might want to practice the maneouvre a couple of times first.
There are other safelights using LEDs which will also give enough light as well, as I understand it.