[TOMT][UK ADVERT]Possibly BT or Talktalk advert from the noughties

I was discussing with my housemates the advert back in the noughties of two cowboys stickmen, that walk towards each other as if to duel. Then a brief discussion as follows:

Cowboy 1: This town isn't big enough for the both of us.

Cowboy 2: Well I leave den.

Can't for the life of me find it anywhere on the internet, and I'm beginning to question whether it was BT, TalkTalk or if I've just concocted it myself. Any ideas?