The TLR7 A, or 8A series lights have a different and incompatible clamp mechanism than the TLR7/8 sub lights, that is not compatible with the Pro Ledge for TLR7 sub 1913, Sig, Glock, or Hellcat lights.
We don't make a Pro Ledge for the TLR7/8A series, and will not make one as the removable part of the clamp is on the right side effectively limiting a Pro Ledge option to only the small portion of people that are left handed.
The custom keys for the TLR7/8 sub are also not compatible with the TLR7/8 A lights, and the TLR7/8 A light's keys are not compatible with the TLR7/8 sub.
For more details on compatibility with specific TLR7 sub lights, and firearms, please read the product page descriptions for the various Pro Ledge for TLR7 sub versions linked below.
Pro Ledge for TLR7 SUB/SIG Rail