Indicator Boots

So I have just replaced my indicator stalks with nice spun alloy ones in satin aluminium and noticed that the stalk rubbers are a bit worn.
I have looked around but can’t seem to find them anywhere.
I am pretty sure that they are Vauxhall Astra or similar.
Anyone any bright ideas?
Thank you.

I think they are Vauxhall’s corsa B Indicators.

Don’t think the boots are available separately…

Thank you for your replies.
I washing just to buy the boots as stalks are fine.
Will keep looking and let you know.