zaffy

I have a broken key fob. The metal shaft wobbles about in the plastic part and we have held it together with tape. Honda want over £200 for total new key. Timpson's want £50 for repair. Ebay £12. Advertised as 433 Mhz ID 48 chip (don't know what that means) I have watched vids on the DIY approach and does not seem above my capabilities. Opinions on the way to go please. Thank you