Cup spolier black washer sleeve

When I bought N0ddies spoiler it only came with one of the black plastic washers that the silver bolt goes in to. Does anyone have any suggestions as to what could be done for a replacement? Will drilling a smaller hole (the size of the bolt) and just getting a rubber washer from B&Q be ok?

Picture of said washer sleeve

download.jpg
 
not sure you'll be able to buy anything like that but if you know anyone with a lathe it would be very easy to make one and cost pennies
 
have you tried looking in B&Q, i think it theres to stop the tightening of the bolt squashing the frame of the boot. you could alway use a washer and a small bit of tube (spacer/packer) B&Q may have some.