Help I left the wheel nut adapter on when I drove off the other day and now its gone

Any of you know where I can get one, the stealer here says 'dont normally keep them'

Gazza Chawton White TDV6 HSE with Alpaca and Rodium, Automatic Climate Control,
Privacy Glass, 22 inch, Hawke Alloy Wheels, Brembo Front Brakes, Premium ICE Pack, Clear repeaters, Chrome Driving Light Surrounds, Tasmods, Chrome handles, HST Grille, Chrome Side Vents, JE ECU Upgrade

I had no problem getting a spare one (cos they can break) from a dealer, if you know the 'ident' letter that you need, it was only a couple of quid from memory. I have also seen them on e bay.  RRS TDV8 Buck Blue (no, not now in my dreams). ..........D3 TDclankety clankV6 ............BMW 318i

Thanks for the tip Chawton White TDV6 HSE with Alpaca and Rodium, Automatic Climate Control,
Privacy Glass, 22 inch, Hawke Alloy Wheels, Brembo Front Brakes, Premium ICE Pack, Clear repeaters, Chrome Driving Light Surrounds, Tasmods, Chrome handles, HST Grille, Chrome Side Vents, JE ECU Upgrade

Dealer will input chssis number on system snd order, £4 from memory