"A BBC spokeswoman said several times in an interview that Top Gear was "an entertainment programme, and should not be taken seriously."
They are sold by Toyota Gibraltar Stockholdings, look them up on YouTube.
TGS is merely a distributor and outfitter of Toyota vehicles for the UN, who famously uses the 70 Series Land Cruiser. But, TGS manufactures zero vehicles -- they simply outfit and work on vehicles that Toyota currently makes.
TGS does offer the Hilux as well, but only the current 8th gen model: https://www.toyota-gib.com/en/models/hilux.html
The Hilux in the above Top Gear video is a 4th generation model, which started production in 1983, and was last manufactured in 1997 when the final plant in South Africa stopped manufacturing it.
Edit: it's S2E4 "Unscripted".