Seamaster 166.091 assistance requested

I am looking for some guidance here, folks. My Seamaster 200 166.091 leaked...a shade-tree mechanic messed with the crystal and gasket prior to my ownership. It is getting rehabbed locally, but my guy needs a few parts. Does anyone have a source for:
Crystal, crystal gasket (must have). I saw a company called TM Watch, but don't know if that includes the gasket and whether that is a reliable source.
Dial (optional)
Handset (optional)

I really love how this one wears, so I want to get it back up and running.

Appreciate any suggestions/recommendations are greatly appreciated - Mike

Gratuitous watch shot 😉