Most Hofners are due for a neck reset sometime in their history. That might be the permanent solution to the high action. I have three Hoffy archtops, none of which use the standard bridge, and all of which run as low an action as is physically possible, just to keep the strain on the neck joint as small as possible. Early models used a two piece bridge with four grooves along in the upper part, and the intonation was adjusted by fitting short pieces of fret wire into one groove or another. Later models had six adjustable saddle pieces, and they do turn up on Ebay. Every Hofner I have seen has a Zero Fret, so the intonation adjustment at the nut is out. You can get flatwounds specially made for the Hofner from the German factory, which is stil very active, and they sound great.
You can find all about the very active worldwide Hofner community,
HERE
Cheers
Dave
PS My Hofners are:-
6 String President
500/5 Bass
Senator 12 String
175 Six String solid
Classical nylon strung.
None of them are 'investments' they are shamelessly modified or re-modelled to make them playable as useable instruments. Three of them were put together from parts.