[NFSW] How to pull prices from another site

I’ve got a small affiliate site selling rampantrabbitvibrators.co.uk rampant rabbit vibrators and i’d like to be able to pull the prices dynamically from the Ann summers website rather than manually updating then (as they change A LOT) unfortunately i’m not really sure how to google this and after buying two books on php i’m not really any the wiser. Can anyone point me in the right direction?

Cheers