No one imports them as there is no market for them. There was some interest in them around 20 years ago, but nothing since. it is just a small niche market in the US as well, so there are very few places that sell parts for them. You are going to have to buy a top fuel body from the US.
There's not much of a selection of suppliers either. I presume you've already come across them but I only know of
Grand Motorsports or
RJ Speed, who bought the old Bolink bodies.
And the new Traxxas Funny Cars are mere toys compared with a proper r/c dragster.