Anyone know a custom woodworker who can make a case for a vintage receiver?

How about this?

https://www.ebay.com/itm/396960882481?itmmeta=01K5BK0WVYRETV12PJXVMJ231R&hash=item5c6cb65f31:g:OL8AAeSwl7xoneZF&itmprp=enc%3AAQAKAAAAwMHg7L1Zz0LA5DYYmRTS30lToBXNEQ00EJ%2FHCMwlyumegKOpq9S0RWZNu0ToCXnULAIjSImg2pm8XAvpGSs227sx%2BnmSkm2O321qpqWNxin34UDZjk03MOpPgg%2FbvEQPFi9H0YgK%2FwQ6ufT46vi3liVBG8H7EAyh1H75yp%2F95cBhOE2XS9DGU52Hu02W%2B79dZy2pP5%2FmduV8uKwKdqqguoH6amvjFSX0jm7YX%2FecHm5lSlFxkpft6MqizMPP4jkaKw%3D%3D%7Ctkp%3ABk9SR4zOg_OqZg

Maybe contact Lou Hinckley at Daedalus Audio , aside from building speakers he has done work for Modwright maybe he can accommodate your particular need

Find a local woodworker, support your community. 

Look on Etsy:

https://www.etsy.com/search?q=wood%20box%20for%20stereo%20component&ref=search_bar

Several wood enclosures available. Contact maker and ask for custom job. 
Or, contact your local cabinet maker. This is easy woodworking. Depends a bit whether you just want a face plate, or a whole enclosure and whether it requires ventilation slits/grille. I would make my own, but sorry, not offering to make yours. Already have too many projects.

Check out Timbernation. I just ordered a pair of walnut shelves; reasonable prices, infinite options.