After being let down by another website (2 weeks later, the part still hasn't arrived and I can't get a response from them) I found Spares2Repair. A lot of other sites didn't stock the part I needed, but here they had it, it was cheaper than the first place I tried, and they had the option for next day delivery. I ordered 16:55 one day, and it arrived 10am the next.

This was everything I could possibly want from a site like this, and I will be coming here first on all future occasions.