$100-$175, depending on condition.
The model 5100 Stevens shotgun has a plastic stock
1950
1940's
That may be tough since the tenile plastic stocks tended to break and there have been no aftermarket replacements. Try Gunparts Corp or Jack First.
Boyd's stocks on the net.
The Stevens Model 94 with the plastic stock and the markings 94B and 17 in a circle on the right side was likely manufactured in the early 1970s by Savage Arms. This model is a single-shot shotgun that is popular for hunting and sport shooting due to its simplicity and reliability.
Your Stevens model 240 was made from 1940-1945.
able firearms on the web
1952
model 94B Stevens plastic stock was mfg in 1950. Stevens uded letter code starting with A in 1949 until P in 1969.
Try e-gunparts.com
it's probably a model 5100. the tenite (plastic stock and forend) as it was called was likely made sometime around wwII, because of a shortage of wood built gunstocks and forends