Originally Posted by veganbikes

Interloc Racing Design makes a very high quality freewheel if you are looking to avoid the low end stuff that exists most places. Freewheels are rarely found these days except on low quality bikes so trying to find quality that isn't NOS or used is difficult.

Classica Freewheels 5/6/7-Speed ? Interloc Racing Design / IRD

They also make some other really neat gear for modern and vintage bikes.