I'm not sure that I can think of any flying school who, with reasonable advance notice, wouldn't be perfectly happy to organise an intensive training course for you. Just talk to them.
All of your existing logged hours will remain valid - you'll need to do some revision in the air of things that you've forgotten or slipped on, but equally the regular lessons and taking yourself away from work for a few weeks should ensure that you're then on a much steeper and healthier learning curve.
G