I'm a big fan of El Yucateco, I recently got hooked on both their Carribbean habanero and "xxxtra hot mayan recipe" habanero. Both really solid sauces and pretty easy to find. Haven't seen it in years but "Brother Bru Bru's African pepper sauce" is pretty damn tasty and that Carribbean sauce by El Yucateco kinda matched the flavor profile so that was a nice find. Marie Sharpe's is a nice sauce from Bolivia, it uses carrot as an additive so its got a nice orange color and it adds a bit of "bulk" to the sauce.

I'm also a big fan of a kind of "sauce" you make at home but its not really a salsa, it's more a like a pickle. Super easy and delicious though. Squeeze a lime or two and add salt and water to create a simple acidic brine. Then add thinly sliced habanero and serrano and then whatever you want to brine. My gf taught me the recipe using onion slices but we also tried it with chunks of mango and damn those were delicious. Sweet heat! Nice dessert item for those that love chilis. The onion version should last a couple weeks in the fridge and as you eat the onion you can replace with fresh to keep it going. Although its better the next day as the flavors have more time to get into the onions it should be ready within an hour or 2 if you want to consume it same-day. My next goal is to do it with fresh pineapple. I still have 2 bright red homegrown habaneros left from the garden to play with.

Edit: oh and you can just sprinkle a spoon of the brine over your taco instead of squeezing a lime, I highly recommend that, super delicious alternative.