Agree with those that have said to borrow a Moses basket off a friend - they don't last long, esp for bigger babies, most are out by 4 months old. I have a solid wicker one that will eventually serve as a toy basket, but has already housed a newborn niece as well as DS!
You will need to buy a new mattress but they aren't expensive (new ones recommended due to SIDS risk I believe?).
You def don't need expensive fitted sheets for Moses baskets either (unless of course you want them!) as normal pillow cases work well tucked in properly.
Kiddicare are a really good supplier - price is good etc but what makes them great is their delivery service; they text you to let you confirm/choose delivery dates/deliver to neighbour etc, then on the day they text again to say what time they'll deliver. Sooooo bloody helpful, why doesn't everyone else offer this?!
Also good to note that John Lewis do Click'n'Collect for free to Waitrose stores, so you don't have to wait in for deliveries from them either.
I'm sorry you're still suffering with the sickness Squiffie, horrid for you. Virtual ginger tea in case it helps -> 