the component LAN8742AI-CZ LAN use in your design board is very difficult to buy. Do you have an alternative?

[nMANI]

..

[AlexWEI]

can you try LAN8742A-CZ,  the AI-CZ is for the industry version which have the wider temperture -40 to +85 degree. 

the A-CZ have 0-70 degree temperatue. 

in Mouser it have stock for the two chips in stock.