Taupe (FDE) milspec A2 grip
This is very similar to the Knight's Armament taupe grip used M110 SASSS, and replica clones, but is not made by KAC. The color is a shade lighter than KAC, maybe closer to a Magpul FDE, and half the cost. Same A2 fit. One that the KAC clone nerds like Charlie could or would probably never be able tell the difference, especially as Knight's "taupe" has changed over the years.
I personally work with military replica rifles, and often times use KAC, Colt and Daniel Defense parts. Sometimes, where it is less obvious, in small parts, some builders and customers like to save a few dollars here and there on parts where it really might not matter if you have the exact perfect part. Perhaps a grip is the right place? I also sell KAC grips, so I can help you if you want one of those. KAC can be expensive, and is often out of stock. I love KAC, and if you can afford it, you should buy genuine KAC, if it is in-stock. Is there any difference in quality or functionality between the two? I don't see any.
Please feel free to ask questions before you buy.