It's me that sells them, I've got no contact in seat although i did contact seat to see if it was possible to get individual build numbers for uk cupras and R's, although due to the masses of time it would take them they declined. Your build number is extracted from the vin number there is no contacting people on my behalf to get a number, the number you will have is your "production Number" this is the number your car rolled of the production line and is unique to your car.
I charge for the plaque, you get an oem sized plaque with oem plaque lettering which is deep engraved and coloured !
I've made loads up for mk5 golf GTIs using the same numbering (by production) as i would use on the cupras, cupra R and cupra
K1
I've also made up plaques for edition 30s using there unique build numbers, aswell as plaques for my own mk2 golf gti and other mk2 owners.
The plaques are supplied with an alcohol cleaning wipe and 3m double sided sticky tape and I can make them up for any seat be it an
Ibiza cupra, cupra r or
k1
Cheers
Bry
Piccys