Probably best to make your own list, so you understand what each thing is for, rather than just buying in a load of stuff and thinking that's it.
Everyone on here seems to be panicking about lambing but with small numbers not much is likely to go wrong, and if something major does then your best bet by far is to pop the ewe in the back of the Land Rover and get her down to the vet (phone first), rather than messing about with tackle you don't know how to handle, and delaying proper treatment. The vet would far rather you consulted him/her unneccessarily than that an animal suffered. Taking the animal to the vet is cheaper than a call-out and means he/she has everything needed to hand.
We have gloves for hygiene, 10% iodine to dip the umbilical cord (we do it twice a couple of hours apart), farmers lubricant, old towels to wrap a cold lamb or to make carrying them easier, castration rings and applicator, mini temporary eartags, a notebook, a powerful torch plus a head torch, colostrum sachets and a feeding bottle, plus milton to sterilise the bottle should we need it.
We also carry penicillin and terramycin antibiotics (but if you don't know how, which or when to use them, get a vet's advice and the dose from them), a selection of syringes and needles, which we have all year round anyway.
We don't bother with kick-start or prolapse spoons and so on, as we have never needed them and in an emergency if the vets was closed we could borrow from someone nearby. We do have a lamb tube and syringe but unless you are confident of how to use one you are more likely to kill the lamb than save it.
This is just some ideas for you, but do find out how to lamb before you start
Good luck
ps - I've just realised that we do have a prolapse spoon thing which we bought 16 years ago and it's still unused - I'm delighted to say