OK, I tracked it down online. It was in "Fakt": PiS got 42%, PO 27.7% and ex-commies 8.8%. No-one else got in. The good thing is that PiS could go it alone and secondly -- PO would be forced to jump into bed with the Polish nation's ex-tormentors, Soviet stooges and Katyń conspirators.*
That poll seems out of sync with the rest, so I wouldn't take it too seriously. Both ZL and Nowoczesna are attracting support because their economic policies are quite sound, and it doesn't seem credible that they would suddenly fail.
Another poll today suggests this :
PiS - 36%
PO - 25%
ZL - 8%
Kukiz - 7% (where did this come from?)
PSL - 6%
Nowoczesna - 5%
Translates into...
PiS - 214
PO - 143
ZL - 39
Kukiz - 34
PSL - 20
Nowoczesna - 9
So the generally agreed outcome from the last opinion polls is that PiS will require Kukiz to win control of the government, and that they also will be far, far short of any possibility of changing the constitution. I think we all know that Kukiz would take the offer of entering government, but given his association with Ruch Narodowy and other unsavoury types - does anyone believe that such a coalition would be good for PiS?
PiS need to be very, very careful though. PO are far more tactically aware than them, and it's not beyond the realms of possibility to suggest that PO and the others could intentionally refuse to allow anyone but Kaczyński to enter as Prime Minister, knowing that he would destroy everything.