Apologies for the state of our downloads platform, @Greg_Turk ! The product we’ve been using has gotten very difficult to maintain and things are in some disorder as we migrate to zenodo. As it happens, one of my colleagues just set up the file I think you need. The full list of resource_id values is linked from there but the one you want, for iNat, is 53. Let me know if that doesn’t help!
Thank you so much, Jen! Also, please pass along my thanks to Katja Schulz if you happen to see her. This is exactly what I was looking for. Once I knew that these records contained iNaturalist references, I was able to figure out that the resource_id that I want is 1177. I found 485171 relevant records, which is a huge treasure trove.