It came out in Japan not that long ago so you could import it in its raw Japanese form.
Volume 43 of Naruto includes chapters 391 to 400. In this volume, the battle between Naruto and Pain continues, and Naruto discovers the truth about Pain's identity. The volume also delves into the backstories of Pain and Jiraiya, shedding light on their connection.
Naruto manga part 2 Volume 43 chapter 394 "Sasuke's Victory".
Naruto releases the Kyuubi's 8-tail form in Volume 43 of the Naruto Shippuden manga series.
I believe it was from episodes 40-43 of Naruto Shippuden when Naruto fought OROCHIMARU*
Naruto Shippuden episodes 41-43
volume 43
On You Tube now
So far its been 43 no. episodes of Naruto Ship. English are out
Naruto Shippuden Episode 43 and 292. Both were when he was in Nine tails state.
episode 43: sakuras tears
Naruto finds about the death of Jiraiya in Naruto Shippuden 152 " Sad News "
Shippuden Episode 43.
it has aired on dattebayo its in Japanese but its English subbed though
The volume is 43 = 4x4x4=64 cm3