I want to install a 48A EV charger. This would require a 60 amp dual pole breaker.

I want to run this to my sub panel, which is a Challenger catalog no. SB20(20-40)CT model no. 4.

Label says to use Challenger type A, type C , HAGF, and GFCB breakers.

Looks like I currently have a mix of type "MM/MH" single and dual pole (type A? These seem to have the side clips) and Type "MP-C" dual pole (back clips). Here's some images:

I can't seem to find a dual pole 60 amp type A (side clips) breaker anywhere (max I can find is 50 amp).

I have an Eaton 60 amp type MP/C dual pole. If I move the one 20 amp down type A breaker down above the other 20 amp type a breaker, then can I put the dual pole 60 amp type BR/C breaker in the open space?

Side note: I've read the old challenger type C breakers are a fire hazard (?!) - are these crouse hinds breakers okay, or do they need to be replaced?

Note: updated with more info and pictures.