Unfortunately these are hard to find as they are specific to the Nokia wireless charging units...if I come across something I will let you know. Fleabay is probably your best bet...sometimes stuff pops up over at A4C as well.
Seems impossible to get the AC-301 power supply and the CA-211 power cord in the same market. If you look down the page you'll see the Upbright replacement for CA-211 cord is only $1.45 less than the complete unit.
Having fiddle farted around with power supplies and cords for a pair of "Orb" style chargers I picked up cheap; I've learned a bit. These Upbrights have the correct 12V output if they aren't labeled wrong on the site. Mismatch on that is a PITA.
So it turns out I got the two DT-910's from floridarandy as part of a 928 bundle.
The AC adapters I got from Upbright (linked above) do the trick nicely. They just came in and I tested one. Shows charge rate 17.85% and holds a good connection even through a TPU case on my 1520.3..