If Boehner is really that scared about his speakership he could make a deal with the Democrats. By promising to bring in the sane Republicans (there should be 25 or 30) and let them vote with the Democrats on certain issues where they can reach an agreement (the budget, immigration reform, debt ceiling) and in turn the Democrats will help Boehner keep his job until the end of the current Congress.
Why would Democrats do that? They can still get what they want by watching the Republicans and Boehner destroy themselves, as well as make the GOP look worse to gain more seats.