Working torpedoes as the US Navy's 1937 stockpile

What should the US Navy stockpile in 1937?

Older torpedoes that work, or at least reliable exploders, to bridge the period needed to fix the Mark 14.

A stock of older, reliable torpedoes would give returning submarines something usable while the Mark 14 was being fixed. A follow-up reduces the requirement to working exploders, which would occupy less warehouse space. Radar is suggested as an alternative, then challenged under the question's 1937 availability restriction.