Hello! I have an Explore Scientific/Bresser 127/1900 Maksutov, and with one of their proprietary types of finder-bases...
I get my own Vixen-type finder-shoes here...
https://www.aliexpress.com/item/4000...6bce4c4dPGstmb
...and dirt-cheap, as you can see.
But if you'd rather order from close to home...
https://www.ozscopes.com.au/skywatch...cope-base.html
https://www.bintel.com.au/product/bi...tail-base-sct/
https://www.bintel.com.au/product/zwo-finder-shoe/