ATSF ATSF Coal Trains

I've been researching D&RGW coal trains a lot recently (more like obsession than research). ATSF connected coal trains loaded and empty with D&RGW, and I'm looking for photos of the coal cars in particular. There's some on the 'net, but others from the early 80s are just unobtanium. Photos I seek are to be used to have custom decals made. I cut off my modeling period at 1983, so trains listed 1984 and after I'm not interested in.

This site has a lot of consist, origin/destination/routing and train number info for D&RGW coal trains, and is the basis of my research.
http://www.carrtracks.com/drgw.htm
This album of coal gons and hoppers is also super valuable, but gaps exist. https://www.flickr.com/photos/photographernikon/albums/72157669125810681

ATSF Train 4466/4476 (D&RGW train 725/726): HG Coal at Hayden, CO to Pueblo then via ATSF train 4466 to Celanese Corp at King Mill, TX with 73 loaded cars marked SSIX and IPSX (Train 4476 empty)

I have searched high and low for SSIX photos of yellow coal hoppers. I found one, but no broadside detail (https://flic.kr/p/2iGoJGF). I have found black cars, but no detail shots (http://www.rrpicturearchives.net/showPicture.aspx?id=454236). The cars trailing in this last shot are these. The D&RGW groups.io group noted the SSIX cars of this style built by RTC in 1979 were later sold and remarked as CELX in the mid-80s (https://flic.kr/p/LQxcMr). I have yet to find a broadside shot of these unusual cars in SSIX reporting marks. I'm looking for data and drawings on this car in particular (the cars listed above at all Ortner 5-bay designs available in multiple scales), as I intend to draw it up and 3D resin print them.

I have also looked extensively for IPSX car detail photos, especially the Iowa logo and the smaller logo near it (https://flic.kr/p/LH6JPV). There's a photo of a new car that has no Iowa logo, but a small, different logo in in its place (https://flic.kr/p/Mpxykn).

Anyone have photos of these oddball cars?