After careful research I've managed to locate the reference pinup art used to make all the Sector 9 Downhill Division pinup girl decks.
I've overlaid the original art over the deck and provided a link to the full image.
Station wow - Gil Elvgren / Lacey
https://www.metmuseum.org/art/collection/search/763986

Sitting pretty - Gil Elvgren / Annika
https://gallerix.org/storeroom/1852214180/N/1184712484/

Sheer comfort - Gil Elvgren / Ginger
https://www.flickr.com/photos/57910012@N05/6899067669

All wound up - Gil Elvgren / Daisy
https://nylon.net/pinups/x/elvgren/x/elvgren$AllWoundUp64.jpg
I've been spotted - Gil Elvgren / Tiffany

Cold feed - Gil Elvgren / Brandy
https://www.flickr.com/photos/pinupark/27755475447
This one was actually super tricky for me to find. Sector 9 actually manipulated the image pretty hard to get it to fit on the board.

Pinup with Monkey - Joyce Ballantyne / Natasha
https://www.flickr.com/photos/pinupark/25166447668/in/album-72157663616097628

Temptation - Alberto Vargas / Roxanne
https://www.flickr.com/photos/pinupark/26493752869/in/album-72157688198599071

Mona - Gil Elvgren / S9 Goddess of Speed Wheel graphic
https://nobilified.com/products/mona-heartwarming?variant=51508056772