Not sure there's much specifically for DWAITAS yet.
But how about GURPS Egypt? Available in pdf for $7.99.
GURPS EgyptEdit: Ha! I already have the hardcopy of this!
As a testament to how useful these GURPS books are, 4th Edition GURPS Low Tech and High Tech sourcebooks are my go-to historical tech books.
Anyone who thinks the Craft Skill is useless needs to pick up Gurps Low Tech.
If anyone is thinking of using GURPS Sourcebooks for DWAITAS here are my notes:
Converting Tech Levels
DWAITAS Tech Levels (TL's)
TL 1 = Gurps Tech Level 0 Stone age (2.4 Million BC to 4500 BC)
TL2 = Gurps Tech Level 1 Bronze Age 3500 BC +
TL2 = Gurps Tech Level 2 Iron Age 1200 BC +
TL2 = Gurps Tech Level 3 Middle Ages 600 BC +
TL3 = Gurps Tech Level 4 Age of Sail 1450 AD +
TL4 = Gurps Tech Level 5 Industrial Revolution 1730 - 1880
TL4 = Gurps Tech Level 6 Mechanised Age 1880-1940
TL4 = Gurps Tech Level 7 Nuclear Age 1940-1980
TL4 = Gurps Tech Level 8 Digital Age 1980
These books are perfect for Classic adventures and for plot ideas.
Here's what you can achieve.
Taking the effect of 1 Kg of C4 Plastique Explosive from UNIT: Defending The Earth (p.94) we get:
C-4, 1Kg (Plastique Explosive) (1.4 relative explosive power) [10/20/30]
Serpentine Powder (0.3) [2/4/6]
Ammonium Nitrate (0.4) [3/6/9]
Improved Black Powder (0.5) [4/7/11]
Mercury Fulminate (0.5) [4/7/11]
TNT (1.0) [7/14/21]
Dynamite ( 1.2) [9/17/26]
Nitro Glycerine ( 1.5) [11/21/32]
ANFO ( 0.5) [4/7/11]