Yeh, before receiving this suggestion, I went into ATT online, exported via VCF zip file to my PC, unzipped, attached the Fire via USB, copied all of the VCF files (all 732 of them), pasted them into a folder I made within Downloads in the Fire, then unconnected the USB, went into Contacts and Imported the files into that app, and what do you know, they work
. Only problem I see, if there's more than one email or phone number, you only get one of them. But basically, I'm very pleased. I'll have to update, but for a start this is fine.
Thanks for your help