I did some reading on this. France did give out soft loans to Poland and Little Entente to buy armaments in French factories. But for rich France that was peanuts.
Factoid - when France could not meet orders - then Czechoslovakia provided the cannons or tanks, as Skoda was owned by Schneider.
Thought there was some investment but as you say a relatively low proportion.
In terms of Skoda due to the decline in home production and the increased demands as rearmament started Britain was actually importing armoured plating from them in the late 30's.