I found a thread on here that touched upon the subject but drifted off into merits of the 172 over the 171 etc I could not see the original question answered.
As I am now also in need of the same spare tip I thought I would ask again if any one has a specific source they can quote.
Please note I am very happy with my punch.
I am not interested in alternatives or a discussion of the x/y/z of any thing else.
Please only reply if you know an actual source !
Thank you
Clive