Boot lock barrel

[tysonn]

I have a 59 2 door(convertible ex saloon).Although it came with a new barrel in the bootlock I never got a key for it when I bought the car.The square shaft had the number 890 stamped on it.Mistakenly I just bought the first key(an FS)I saw from an Ebay key seller which didnt fit.I then discovered it could be an FP,FA etc etc.Although theyre only a couple of quid apiece I could have made a fair few purchases before getting the right one.Placed a wanted ad on here then found a member selling a new barrel (key106)bought from ESM.They advertise this as being for the 4dr,van and pickup door and saloon boot.Bought this but it doesnt fit!The collar at the bottom that takes the rollpin is too narrow so the rollpin misses it completely.Does anyone know which barrel I actually need?In the pic(according to ESM website)the barrels are as follows from left to right:
1. 2dr door
2. Pre 64 door RH
3. 4dr door and boot(the one I bought)
4. my existing barrel[frame][/frame]