If the cone is bad, there are some 8 ohm 4 x 10 in speakers on eBay now.
Vintage Radio Shack 4" X 10" Full Range Speaker - 40-1297C NOS New Old Stock! | eBay
Vintage Radio Shack 4" X 10" Full Range Speaker - 40-1297C NOS New in Box | eBay
1970 Molar reconed radio speaker 2864785 | eBay...