Starting my Clio?

Hello, my problem is very similar to everyone elses on here. My car is a 51 plate 1.2. My keys got wet, the locking fob does not work and as such the car won't start. It does tick over and I thought originally it was a battery problem, so jump started the car and nothing, so would appear it is the immobiliser. Is the advice the same as below or does the advice relate to an immobiliser with a key pad?

Called Renault dealer adn told only way is to buy new key at £150 and absolutley no other way around it and this would take up to 6 weeks. 6 weeks without a car???

thanks
LeAnne