Yes you can still fit the old school blades, if you want to save some money. It is like budget and premium tyres/cars/houses/clothes/shoes/etc. Everything is out there for the right price to catch the right buyer.
In the second generation car the first blades came from Denso. More likely to use something similar for the third generationcar but any brand will do as long as you have the right fitting.
As long as the blades are in good condition, they do not need to be aerotwin to pass the MOT and drive around safely.