Looking for help with new parts

Hi Everyone!  It's a pleasure to join this group - I've had my bike for nearly 10 years and I love riding in the summer... but recent world events means I'm just starting to take a bit more interest in looking after it myself seeing as taking it to the garage isn't an option!

I work for The Orange Tree theatre in Richmond as a Carpenter and Production Manager, so I'm used to fixing things, just not motorbikes! 

A few years ago I lost the cushion off the back rest somewhere on the north circular (oops!) and Ive never bothered to replace it but I recently decided I could finally afford the part so I ordered it from motorcyclespareparts.com.  Sadly there's another bit I'm missing so I'm hoping someone on here will be able to help me find it!  I'll put a separate post up with info of what I'm after.  In the mean time, its lovely to meet you all and here's a picture of my bike.

Lisa xx

hello and   lisa