IH 10 Disc scrapers?

I have an almost-decent IH/Case 10 double-disc grain drill. Unfortunately, most of the interior and exterior disc scrapers are worn or missing. It appears that the exterior scrapers are a simple piece of hardened or spring steel. The interior piece is the familiar cast pivot, with attached steel "wings".

I've been unable to find any used scraper parts, much less NOS or new alternatives other than darn expensive rotary scrapers.

Any suggestions or solutions? We're having another continuous precipitation season here in N. California, and I need to seed into pretty sticky soil.

- David