Wheel caps - a Q?

[ccohen5]

So I have a set of Azev Type A wheels which have a wheel bolt cover and
would like to replace this with one that reflects Audi in some form.

AFAIK there are two possibilities:
895 601 170A which is black
or
895 601 165 which is silver

If anyone is using either of these wheel caps, please could you measure the
diameter in millimeters (if possible) so that I can ascertain whether a fit
is a possibility.

Alternatively - possibly, do any Euro listers know if Azev makes model
labeled caps.  The web site is in German and they offer no contact address
other than snail and telephone and my German is seriously impaired!!

Colin