I saw a couple sets for $80-$115 around different forums, sucks no one here has LM's.
I might try to Tirerack since it's only $24 per cap, I'm just hesitant because I'm not too sure if they'll fit my 18'' LM's
Can anyone verify that these caps from here *CLICK OPTIONAL HARDWARE*:
Why don't you call TIreRack and ask them? They'll be more informative than us guessing. BBS caps come in 3 different types, I don't know which type you have on your wheels currently. They should be 70mm though, so there's a great chance those will work.