A more practical solution might be to keep the Labour Party but remove Jeremy Corbyn.
It won't be long...
I wouldn't be as sure as I once was of that if the stories are true of the hard left looking to 'cleanse' the PLP machinery and Commons of anyone who doesn't agree with Comrade Jerry and his band of brothers. He could well be in for the long haul if he's successful and the PLP fully exorcises the New Labour elements.
How that will play out in the polls is anyone's guess if the recent article in the Indie was correct, reporting a study that suggested the UK population as a whole was more left wing than previously thought. Admittedly it was the University of Sussex, so take that as you will, but I do think JC's going to be around a lot longer than CDS!