Oil filler neck

[D&Gbuick]

Hey guys.. I have a question., and in sure the answer is somewhere on these threads, but I swear I've tried to find it ! Lol!
Rubber or hard plastic filler neck bushing, washer... Etc. Any pieces between filler neck and valve cover is gone. Where can I find these pieces?? Also the cap and neck as well, if there are any. Thanks in advance

 

[pacecarta]

a slotted metal washer goes on first, then a seal ..
https://gbodyparts.com/product_info.php?products_id=1698&osCsid=01cea4ec7d675e004d22b9971d746fad

caps are available https://www.ebay.com/itm/1986-87-Grand-National-GNX-Limited-T-Type-Engine-Oil-Fill-Filler-Cap-25519537/391895658033?fits=Submodel:Grand+National|Make:Buick&hash=item5b3ecd2e31:g:OK8AAOSwoydWo4YF

tube hasn't been reproduced yet

 

[D&Gbuick]

Gbody... Cool. I'm actually an hour away. Thanks!