Renault FT engineering drawings?

[Bozothenutter]

Are these available anywhere?

Complete, partial, free or at a cost?

 

[Kingsman]

Seems highly unlikely at this vintage.  You might try the Renault archive - it was their design after all.  But their Billancourt factory and head office was bombed by both German and Allied air forces in WW2.  Also you might try the Weald Foundation in the UK, who completed the full strip-down restoration of a pair of FTs in 2018.  You could also try the archive at Musee des Blindes at Saumur.