Dating Certificate


Hello all
I am not sure if this is the best place to post this - please ignore, if so!
I am in the process of importing my 2005 daihatsu sirion from Greece to the UK. The DVLA rejected the first application and need a dating certificate.

Do you know how to obtain a dating certifcate? Is this information on the Certificate of Conformity? Also, is there a cheaper place than 318 GBP? It seems quite extortionate.

Thanks for your help!!!