Next to me help!! Cannot find Chicco Next to Me replacement straps?!

Hi all, We have a second hand Chicco next to me for our baby (have replaced the mattress etc). But we did not realise there were no straps that came with it! Does anyone know where I can find them or what sort of straps we can use as a replacement? We would need them asap/next day/prime as baby is coming very soon! Thanks!