Have seen 3 signed cards marked PROMO from a Jan 24, 2015 hotel event, but they are #ed 1, 2 and 8. Anyone know how many there are in the set ?

There are 16 cards in the set, and like with the Toys for Tots last month, you can purchase these from Benchwarmer

Correction. 18 cards in the set, not 16

Numbered list of the 18 "double feature" cards:

1 Lisa Gleave / Jessica Kinni
2 Raquel Pomplun / Malorie Mackey
3 Ciara Price / Shelby Chesnes
4 Carolyn Martin / Brandy Grace
5 Cecille Gahr / Nicole Bennett
6 Lana Kinnear / Shannon Malone
7 Jessica Hall / Brandie Moses
8 Miriam Gonzalez / Hiromi Oshima
9 Candace Kita / Katarina Van Derham
10 Pamela Horton / Amelia Talon
11 Cassie Cardelle / Melissa Riso
12 Carly Lauren / Kennedy Summers
13 Dani Mathers / Val Keil
14 Anna Sophia Berglund / Audrey Aleen Allen
15 Brande Roderick / Sara Underwood
16 Jessa Hinton / Nikki Ziering
17 Michelle McLaughlin / Tiffany Toth
18 April Scott / Sandi Taylor