Series 1 rear road spring... help!!

Im having a bit of trouble trying to find a rear road spring for a 1949 Series 1 80 inch... its the top leaf thats broken, I think,

Does anyone know where I might be able to get a hold of one? Or does anyone have one?! Its the thin type.

Got the MOT in ten days, dont know if Im going to make it!

And help or advice would be greatly appreciated, I just want to get her back on the road!!

Cheers now,

Amy J

you need the early short type I think GB Springs sell them