Spanish Emission Sticker

Sharrystar

I have the French Critic Aire which Martin Lewis suggested many years ago. I have now learnt that Spain requires Emission Sticker to. I have been unable to purchase online as won't accept foreign  car registration. Can someone advise where, and how,  I get this. Am driving through France to Spain in 4 weeks. Many thanks.

JGB1955

AIUI   (from       Environmental stickers: all rules per country | Eurocampings
" The Spanish emissions sticker is not available for vehicles that are not registered in Spain. Luckily, you can use the emissions sticker from Germany, France or Austria."