Bulova 1934 Phoebe

This was in a small lot of watches I picked up on eBay and just received today.  The crown and stem are missing and otherwise needs some TLC.  The hinged case is stamped Bulova and 10K rolled gold plate.  Inside the case back the movement is protected by a (celluloid?) display back/dust cover. The movement is pretty gummed up.  I've never serviced a watch before but thought I'd give it a whirl.  I'm not sure what I'll find but, if I get that far, any ideas for sourcing a replacement stem and crown?  Thanks.