BBS Centre caps for 328 sport

[SPT28]

Does anybody know where I can get hold of a set? I've been to the local local BMW dealer and they say they can't get them and to try somewhere more 'specialist'

so before I did the big ring around I'd thought I'd see if anybody else has any ideas...

the wheels are being refurbed at the mo, so it'd be nice to have a nice set of caps to go with them

thanks for your help