Alphabet Bricks For V-Tech Push-Along Train (Leftwich CW9)

Bought this V-Tech sit on/push-along train second hand from a charity shop, without realising that half of it was missing!
It should have a little trailer and some alphabet bricks to play the attached letter-recognition game.
If your child had one, you'll know what I mean.
Not bothered about the trailer wagon but really need the bricks, thank you.