cython 0.14

[blubee blubeeme]

I have a port that needs cython 0.14 and not cython 0.26

I tried all sorts of things but this;
BUILD_DEPENDS=  cython=0.14:lang/cython3

always returns that cython 0.14 isn't found, cython 0.24 is available but
my port won't build with that version.

How can I get cython 0.14?