Vernier calipers

[oldel]

I have one like this:

But lost the 'nut' or whatever you want to call it that tightens down the set screw. It was nickel plated steel so it's getting some surface rust unless cleaned and oiled (found it in a shed decades ago)

I've tried the lr44 battery digital ones that every man and his dog sells or has owned and I hate them, always chewing through batteries, and also I know how to read verniers anyway so I don't want to go the digital route.

I was thinking of trying to get a dial gauge version, was planning of getting a wurth brand one (E: pic below) but can't find that for sale in AU.

Anyone know of some place in AU that sells them under $100, not digital, preferably dial (but if not a "windowed" read section like my pic), also stainless steel only - not coated steel like my old one or a basic plastic one or a non windowed one. Any ideas what and where to look?

I'm half considering a similar one to what I had, ie:
https://mektronics.com.au/products/c...-caliper-180mm

Or just taking my chances with ebay/ali, but I would have bought the wurth brand dial gauge for $70-100 if someone in AU sold it.
https://eshop.wuerth.de/Product-cate...gid/en/US/EUR/