I have several return springs that fit vintage Craftsman/Atlas/Delta and a host of other drill presses if they use the coil type spring as shown in the pictures.. I purchased these for my Craftsman drill press model 103.23140 that was manufactured in 1948 and it works perfectly. Spring meets the specifications below. I will ship for the actual cost.
The dimensions of the spring for Craftsman 15-1/2" 150 Drill Press:
Type: extension spring
Feed Return Spring part # 38989
body length (minus end loop(s)/tang) = 4"
body diameter = 5/8"
wire diameter - ~0.080"
wire turns = 50
right-hand winding