I’m not sure if you’ve already tried it (it is one of the “natural” lubes), but Sliquid Organics Silk is a really fantastic condom safe lube. It is toxin-free, body safe, and is a really great quality product.
If you don’t care as much about the toxin-free/body-safe/vegan aspects of the lube, another great product is Liquid Silk. It imitates bodily fluids really well, and is condom compatible.