I did buy by my Bilsteins from BAT but I found Bilstein Sprintlines for the Mondeo from a supplier in the UK. So really BAT is not the only supplier. I wanted to put the link of the UK supplier in this message but I was not able to find the supplier after about an hour seaching at work

. I will look fot the site this weekend.
I believe the question was can you get Bilstiens from one other than BAT. Yes you can. Hell if I bought several dozen Bilsteins from BAT, you could buy them from me!
I do agree that BAT brought Bilstein struts for Contour for the masses to the US.