hi, it is impossible to do it without completely re-upholstering the chair as the chair is built around the frame that the webbing is secured to. In the past i have screwed new batons to inside of existing frame and re-webbed onto these new batons. It is time consuming but cheaper than full re-upholstery. I buy these chairs if you want to sell it instead. oliver 07956 394541
oliver
January 2008