McMaster-Carr, remember the website I took you too when you were over my house the other week? And no, they don't have them in blue, only in SS or brass.
I work with Splat everyday so I know his frustration with the situation; we even discussed this with a long time Winchester collector today & he said that Winchester would almost sell you every part but those screws. He has a LOT of Winnies & he's had to scrounge the screws many times.
We'll find 'em sooner or later buddy........
