..... so 3+ years on and this stuff is no longer even manufactured. However for anyone unearthing this thread and looking to replace a Nevo wall wart this little trick is worth knowing:
The DC jack in the NevoSL base is actually a standard 2.5mm jack as supplied with most replacement wall warts. However, for some dumb reason known only to the designers the diameter of the hole in the case was made somewhat smaller such that only the original custom manufacturers jack would fit.
Solution: open up the base, drop out the small pcb with the DC jack mounted on it. Take a sharp 15/64th drill bit and open up the DC jack hole in the case. The case material is as soft as cheese so you can do this by just twisting the drill bit in your fingers. Resassemble the unit and you have a dock that will accept a standard jack.
I discovered this trick after a client gave me an SL & dock they no longer wanted but they had lost the wall wart.
Hope this helps someone out.