this is a bit off topic, but are you married now?
because it reminds me of the blues song "My Next Ex-Wife"
(she wants half of the half of the half I've got left . . .)
sorry.
nothing on the schwimmwagen, but i will keep my eyes open.
i take that back!
at www.gretmodels.com, search "1/35 schwim"
a wheel/tire set from adv/azimut comes up.
not sure if it is the one you seek.
MR models also shows 'wheels' as a future release.
total of 19 items for this search!