I had mine repaired, but there's always the quartz conversion. I like to see the second hand "tic" rather than the smooth quartz movement, but to each his own.
I've recommended Gary Tayman for updating radios and everyone seems to be happy. Auto Radio, Auto Audio, for antique and vintage vehicles You can have your radio converted to FM and have jacks installed for MP3 players etc. Better than new.
I've never had a speedo repaired... but then again, never needed to.
I used these guys for all my window switch restoration. They also do the items you mentioned.. Give Jeff a call, theyre out in WA State. Opposite end of the country from me, but great service, fast shipping and they stand behind their work..