You might be able to buy the male tabs directly from Lionel Customer service if you call and ask for them.
A couple of other options, try crimping the rails around the fixed end of any loose track pins using pliers to improve conductivity.
Solder a jumper wire long enough to bridge to the next track section onto one of the rail tabs. Add a 0.110 Faston connector to the other end of the wire and connect to the tab of the next track section.