Installing a 48A EV charger. Requires 60 amp dual pole breaker.

I have room in my sub panel, which the label says 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 all of the current breakers are type A (side hooks).

I can't seem to find a 60 amp type A breaker anywhere. Does anyone make a 60 amp breaker with the side clips?

The label also says the box is compatible with type C, but under the wiring diagram part it looks like only for single pole configuration - am I interpreting that right? Or I could I use a type C dual pole here? I have two full slots free.

Note: on my phone and the image upload won't work because file too large and I can't reduce. Will try to upload pictures of box, breaker, and label later.