@c57jn4t
Hi Lutz, I also live near Frankfurt, imho there is only one good store left in the city - B74 in Berliner Strasse 74, although they do not carry any IH stuff as far as I know, but some Filson, vintage Levis etc.
There also is the Red Wing Store near Parkhaus Hauptwache, but I do not buy there boots anymore - I think their Quality Control went downhill since I bought my first shoes from them 20 years ago.
Now I mainly buy online from IH Germany, Statement Store, Cultizm and Burg&Schild. Regarding shoes and boots I switched to Solovair from UK - they deliver hassle-free, customs and tax included...
Cheers, Peter.