Catalytic converter replacement

[Ryo]

Hello
I am looking to replace my old Catalytic converter on my AE86.
For OEM i was not able to find exact part number and i bet it will not be cheap.
I found somewhere mentioned that Magnaflow 23886 will be a good replacement but i am unable to locate a store in Europe where i can get it.
Prices for importing stuff to my country always double the price so it is really trouble to get import stuff outside EU.
Also as my rear exhaust gone i am looking for replacement. Anyone know if 17430-16052 part from toyota can be still available and which price i can expect. Was looking other manufacturers but everything new cost a lot and most of exhausts are loud. Not sure if i can get HKS Sport or Fujitsubo legalis R in europe but i bet not.
I found O2 sensor is available from NTK so at least this don't seem the issue to replace.
I need to pass MOT in a month with this old lady so need to fix that exhaust.
The emissions last time have been pretty high. Lucky that they let the car pass as non CAT but they will not do this exception forever i am afraid This country starts to follow this bastards in EU regulations as well.