558 14TP - it is a very "what if" unit (see
http://derela.republika.pl/en/10tp.htm ). It was supposed to be equipped with 47mm gun, but only on later stage, and there was no such gun available in 1939. If it would have been built, it would have #15 37 mm - unless we want to create a future tank.
On the other hand, hull armour was to be strengthened - according to (speculative) publications, even to 50 mm in front.
559 H-39 / SA18 [prototype tank] - I've already mentioned at unit 477 H-35, that three H-35s (or H-38s) were used in combat in 9/39, and their training use in 1940 is negligible, so there should be only one unit left of these two. It should not be Prototype tank class, so that they are used in a whole platoon (I suggested class 102 Cruiser tank).
Its armament should be #142 or #143 gun, not #12 with old AP round.
Icons of unit 559 are long-barrel, so more appropriate is unit 477 (icon 171).
560 75mm wz.97/25 [fortification] - if it is fortification, it should be 75mm wz.1922/24, used in coastal defence, since 1/30 (now 1/35). It was a French naval AA gun, with L/50 length, corresponding with a weapon #133 75mm L50 m.25 (wz.1897/25 was an obsolete mle.1897 AA variant, with shorter barrel)
There could be added Polish modern
75mm wz.1936 AA gun, as a Heavy AT gun, with similar performance (L/50), used since 1/38 (formations could have own C4P tractors). Picture as for now could be 36926.