Is there any reliable manufacturer with a 26" fork with a straight 1-1/8" steerer? With the manufacturers often referred here I've only seen tapered steerers. On eBay and Aliexpress, Toseek and JAVA often pops up, but I haven't been able to find anything about how good/reliable they are.
Am I missing something obvious, or is straight steerer 26" forks just rare?

They are not super common but they can be found. I picked up a straight tubed 26" Rock Shox Revelation a couple of months ago. It's the RCT3 version with 140mm of travel and a 15mm axle. What are you looking for?