At this time, neither of those datasets are in the API, nor are they in any single place on the website.
Each
material page has it's own delivery time. The closest you can get is the
Material Status Page which only informs you if some material is currently delayed.
Part of that is because there are different rules that apply in certain special cases.. such as objects over a certain size require more production time, etc.
On the other side, shipping costs don't change that often (except for the free-shipping specials). Within any one country it's likely to be 2 years or so between shipping price changes due to negotiated contracts,etc.
I do agree that it'd be nice to have those datasets available thru the API.. another one for the suggestion box.