Springfield Sporters sells a five piece "assortment" pack of front sights suitable for Brit enfields, P-14, M1917 (They're interchangeable). The one's I received appeared to be NOS GI of Brit manufacturer.
Or do you figure that no GI spec front insert will do and you're looking for something commercial?
Thanks for the lead. My sight reads .075, and I don't know how much taller they go.