Blade holder for Delta

[Tappis]

[Rolf]

I put that clamp on my Hawk and bought the clamps from
Pozsgai's Designs - Scroll Saw
Maybe he can help you.

[KJS]

I was looking over the parts diagram for the Delta 40-540 saw and it says that part #40-250 is the Quickset Blade Chuck, which looks like it has been discontinued. Maybe you could try and adapt the part #40-251 Quickset II Blade Chuck instead.
However, you did say you needed the blade support and I see that what Delta calls the "Blade Support" is actually part #1343632. Apparently it is still available, at least from the place in the link below.

Delta 40-540 parts breakdown on ToolPartsDirect.com

It looks like the #40-251 Quickset II Blade Chuck will fit the Delta 40-570 saw as well, but the two parts that Delta calls the "Support" [part #1342241] that the upper blade chuck attaches to and the "Cover" [part #1342242] where the blade tension lever attaches are no longer available. I have been scouring the internet to find these two parts for backups for my own saw as well, but unless someone actually has them squirreled away in drawer somewhere, they are apparently nonexistent.



Delta 40-570 parts breakdown on ToolPartsDirect.com

[Mick Walker]

Tappis, another place to check:
erplacementparts.com