I think that Vallorbe (#47956) might be the originator of the 'Oregon' (#111439) bar dressing tool, but it is harder to find in the US. I see it mostly on eBay or Amazon.
Googling the STIHL part numbers (5605-773-4400 tool, 5605-773-4200 replacement file) mostly shows availability in the UK and NZ. But I have heard from a couple of US STIHL dealers, 'Yeah, we can get that'. Pricing about the same as the Oregon version ($28 tool, $11 file), if you like orange better than black. And single files available.
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Philbert