Last night ordered from r4town.com, today spoke with support guy, he told me that they have 3dsgw in stock and they will dispatch it later today, by the way payed 75$.
I was in your situation till today, had a 3ds with 5.1 fw, but decided not to wait and got a new 3ds xl for 130eur with fw 4.2. Dont wait, sell what you have and get 3ds with proper fw, good luck!