Where to buy cheap RS485 Modbus temperature sensors? I'm looking for

A couple of years ago I came across temperature measurement modules with RS485 + Modbus interface on allegro for the order of 50PLN/pc.
I am now looking for them without success, does anyone know where I can find something like this? I've found a few replacements but all for the price of >150PLN net, and I need about 20 pieces so it's getting quite expensive.
I've found exactly something like this from the Chinese for a few dollars, it would be great but the shipping time is unacceptable - I need to have it at my place by the end of the year.

In a normal period, a parcel sent from China DHL on a Friday arrives at the village in PL on Tuesday, also when writing the post you could still safely do it.