Friends could advocate a phased Israeli withdrawal from the West Bank, perhaps starting with the South Hebron Hills or the Jordan Valley. Ideally each stage should be planned in cooperation between both sides; this would be in everybody's best interests. But failing agreement Israel could start by withdrawing troops unilaterally from one area.
There would be no need for the charade of removing settlers one-by-one as in Gaza. When Israeli troops are withdrawn from a given zone settlers would be free to stay behind, with exactly the same rights as "Arab" citizens now living in Israel.
Israelis understandably complain,
"We withdrew from South Lebanon, and Hezbollah fired rockets from Lebanon.
We withdrew from Gaza, and Hamas fired rockets from Gaza.
If we leave the West Bank almost all Israelis will be within rocket range".
A phased withdrawal meets this anxiety.
Palestinians will be aware that a second phase will not take place unless the first phase passes peacefully.
This is essentially an extension of the “Mofaz Plan”, originally put forward by Shaul Mofaz. Mofaz is a former Chief of Staff of the Israeli Army, a former Minister of Defence (under Ariel Sharon) and was briefly Vice Prime Minister (under Binyamin Netanyahu). His record suggests that the proposal would have some support among the Israeli public, within the Israeli military establishment, and in the Knesset.
Friends might support and publicise this possibility. Consider other initiatives that Quakers might advocate.