I agree with the above two- I wouldn't risk it.
I'm sure there are plenty of fruits and veggies that have vitamin A. A quick google gave me this:
Food sources of vitamin A
Fruits and vegetables. Dark green leafy vegetables, for example amaranth (red or green), spinach and chard. Orange-fleshed sweet potatoes. Carrots. Squashes/pumpkins. Yellow maize. Mangoes. Papayas.
Timber also has a variety of wood types and sizes, as well as a rope boing that goes to the ceiling. He doesn't chew on them either. Well except for the boing, he loves to chew on that and it has to be replaced pretty regularly or his talons will start getting caught in it.
Alfie has all sorts of different perches in and out of his cage. Java, manzanita, rope, 'calcium'/cuttlebone/mineral, 'bee pollen'. I make sure they are varied in shapes and sizes so his feet get a good workout 😄
Weirdly, Alfie has never chewed his perches- even the edible calcium/cuttlebone ones.