Plastic cat/dog house (Ledsham CH66)

Hello, we seem to have acquired a female feral cat and her kittens . She brought her babies to our door Shes wouldnt come in but we fed them and they seem to have gone under our decking. Does anyone have a plastic dog or cat house they no longer want just so we can put a warm bed inside to keep them sheltered in this awful weather. Im happy to collect this evening if anyone can help. Thank you 😊