Right. As Gino said, it appears that a lot of other parts need to be sourced from let’s say Dragon’s M48A1 kits, I Love Kit’s overpriced M48A1 or even custom CAD. Not just the cupola… I did see some photos of someone converting Dragon’s kit to straight M48 somewhere but cannot remember where exactly.
There’s some discussion here: Trumpeter/I Love Kit M48A1 - #47 by KurtLaughlin