I recently acquired an old Romeo 2 from Ebay. However, it doesn't have any serial number or any marking at all on the earstems. Is this normal? Also, the rubbers need to be replaced but there is none available on Ebay (well, there is one but he is selling it for $149. Yikes!). Any idea where I can get those much needed rubbers? Even aftermarket rubbers should be okay. I am desperate! Please help. Thanks.