Brownell's has this. I couldn't find it just now, but there was a tutorial there that suggests:
Stock# / Description
081-014-004 4 OZ. ACRAGLAS GEL KIT takes texture better
081-003-002 2-GUN ACRAGLAS KIT matches color better
I researched the process a while back, but now have become accustomed to the factory grip.
Kahr K9, Minituck
XDM 9 3.8, Supertuck
G20 sold to fund 308