Thank you for all the responses!

For the doorknob I went with Squirrel Hill Locksmith - I texted them some pictures of the doorknob, and they had no problem fixing the issue and mentioned that Squirrel Hill has so many doors like this, it's in their wheelhouse. I'm happy with the job.

I got the following recommendations for the leaded glass (have not acted on them yet, though):

Glenn Green stained glass - 412 243-2772

Michael Franell in Verona - 412-398-3989

and a note to stay away from Prism Stained Glass.

On Mon, Nov 21, 2016 at 9:41 PM, Adam Ratana <adam.ratana@gmail.com> wrote:

Hello neighbors, was wondering if anyone had any recommendations for the following:
Antique doorknob / lock repair - our very old outer door has a doorknob and cassette style lock mechanism that comes loose and Ace Lock didn't seem to have the right parts / tools, but the technicians managed to secure it for a few months. It's now loose again, it seems like maybe a specialist with experience in these types of doors / locks might be needed?
Some panes in the leaded glass portion of one of our doors have cracks in them. Perhaps this can be sealed and further damage over time can be prevented?

Appreciate any and all ideas! Thank you,

--
Adam Ratana
adam.ratana@gmail.com