Specna Arms Replacement Butt Plate (Heavy Stock?)

[Lanson]

I recently lost the rubber butt stock plate to my Specna Arms edge SA-E09. It has the M4 heavy stock. 
 

I can’t seem to find any replacements online or places to buy just the plate: Any ideas or plates that would fit? 

Looks like the image below:

Thanks!

View attachment 140530

 

[Lozart]

Bin it and buy a better stock?