Laptop Hard Drives

I have a Olivetti Echos P-120E Laptop, and my hard drive is slowly dying with bad sectors. I can’t find a hard drive specifically for this laptop anywhere. I read that depending on the connection for the hard drive you should be able to use a standard laptop hard drive and it should work fine. Can any one tell me if this is so, and what I should be looking for when buying a hard drive for the laptop.
thanks