Originally Posted by
Wilfred Laurier
Other manufacturers...
...in addition to Continental (the OP acquired a pair), which still offers handmade-in-Germany models...
...who still make decent 27" tires are Panaracer (my all time favourite tire, the Pasela, is available in 27") and Kenda (cheaper but still fine). There are others but these are the ones I know of.
Schwalbe offers quite a range, including the top-tier Marathon Greenguard.
https://www.bicyclerollingresistance.com/tour-reviews