Can't get turn signal bulbs in or out?

Looks I will have to get new sockets for mine. I got one new bulb in and the spring somewhat "springing". The contacts don't appear to be burned. Of course I got the one fixed that is already working on my 65 Valiant. The other spare I have that I now broke is the one I really needed. It's just totally frozen. I will have to replace the socket in it. One thing I did not notice in the link is something I need to know to help me on this 65 Valiant but also on my 73 Charger. When you install that new socket what do you use to neatly bend the exterior tab of the bulb end socket so the socket stays locked in place. My 73 Charger has the same type of sockets in the tail lights that I had to painstakingly bend up to swap out the housings and now they move around because they're not perfectly seated in the housing anymore.