Sadly Ros, we have very few butchers these days! Let alone one who specialises in Scottish food! Probably in Dunedin in the South Island - a very Scottish place, where a lot of people still even speak with Scottish Accents, and others with a burr in their speech! Big numbers of Scottish settlers and teachers came there in the early days, from Scotland and Ireland, and I have read that the youngsters they taught finished up with very a interesting Irish/Scottish accent which can still be heard in the area.
As for butchers, it's mostly supermarkets and a chain called the Mad Butcher, whose meat is good and prices very reasonable! Better than the supermarket! Everything there of course pre packed, and they don't do the lovely things that the butchers in UK do.
In some of the country areas, yes, selling locally sourced stuff, when I go to my sons to visit, I usually stock up on a few things and freeze. The two closer real butchers to where I live are about a half hour drive away - one is very continental, Austrian people, and the other Kiwi!
Both good, but very expensive. They do make some small goods, but not PIES! Bakery ones not wonderful either - also expensive, for a few pieces of meat swimming in gravy! But I guess I've been spoiled!
Your square sausage sounds like a meat loaf I make - half sausage meat and half mince, chopped onion, salt, milk and egg. Then shaped and baked in a yummy barbecue sauce. Lovely hot or cold!
Now I feel like making a meat loaf - haven't done one for ages! 😄