cheif,
Here are just a few:
Krieger- 1:12x
Lawton- any twist you want
Shilen-1:12x
Pac Nor- 3 groove 1:12x and 1:15
5 groove 1:8x and 1:12x
6 groove 1:10x and 1: 14x
Broughton- 1:12x
Depending on what bullet you plan to shoot in the 375, barrel twist can be quite critical.
JIM