Sorry, it's definitely not listed anywhere, not even at Smeg.
If you go to www.smeg-service.co.uk you can go to spares and use the "contact us" part to inquire if the parts is still available.
The part number I have is the original number which no longer exists. Perhaps Smeg will have a superseded part number.
Good luck with it.
Hope this is of some help.
I have the machine on my parts/technical disc. It's just not listed with Smeg anymore and the part number I have for the thermostat isn't recognised by Smeg either.
Hence the reason I suggested you contact Smeg.
They may have an alternative that I don't know about.
I'll send this post as an answer, that way you'll get the Accept button.
Glad you've got something sorted out with them.
Good luck with the appliance and the repair.