Check out your local gun shop, they usually have a box of mixed dies for sale at reasonable prices, I know Del Selin's in Vernon does as well as Monashee Sports in Salmon Arm.
Lee makes a Universal seating die, available from one of the BANNER SPONSORS THAT PAY TO KEEP THIS SITE OPERATING.
monashee outdoors is in armstrong bc
Frankford Arsenal makes a multi caliber micrometer seating die I've had my eye on. My Lee seating die seems to have variances in depths up to 0.020" at a time.
Where did you find them if I may ask?