Mirror protector nearside only

I have a couple of these fitted to my 2017 Bessacarr but they didn't stop a van smashing into the nearside when I was in Sardinia. I have repaired the mirror body and replaced the indicator assembly. Fortunately the two mirror glasses were undamaged so the protector did save something although was completely destroyed. These only seem to be supplied in pairs but I only need a nearside one. I suppose in the UK it would be the offside mirror that is most at risk so I wonder if someone out there has an unused nearside one that they would be willing to sell. I need one in white.
Can anyone help please