I couldn’t find a uk stockests for TNT valve extensions so I ordered some from Nytro + a set of Zipp brake blocks (I think it was back in March) . Unfortunaly they have not arrived I have e-mailed Nytro a number of times but as of yet they have been unable to track them down. I wondered if there is anyway without a tracking number from the couriers to see if is stuck in customs or something? I brought them with my credit card so would they be insured if they have gone missing in transit?