I ordered a pair of TB48s from coptershop.com, last monday (2-Mar). Arrived on Friday. Many dealers do not have them, but some do.
In the US yes. No one in the UK has the TB48s and as far as I know, no one has had a single one shipped to them yet. My dealer says that they haven't had any at all yet.
Kind of irritating that you can get them off ebay but not from any DJI dealer in the UK.