This is the sort of question I like!
According to PlaymoDB:
(a) "Tree branch/stick, large", light orange, 30 05 3650 is in set 5504 and nativity 4884, so it should (in theory) be available from DS
(b) Only one "bottle for drink", clear green is listed, 30 05 0790- this is the one in 4327 school canteen: though PlaymoDB doesn't actually list it as being found in 5504 it is almost certainly the same.
(c) "Pumpkin", yellow is found in 5402 (Children with pumpkin and cart is not 5502). This is 30 05 9080 and is also in set 4179 which is still on sale in Germany so the part should be available from DS.
In summary, you need to order 30 05 3650, 30 05 0790, and 30 05 9080!