Yes, I used Buddy Dive in 2019 and had a great experience. They have a little "tech" railroad container where they have sorb, 3L tanks, and you can get trimix and whatnot there. Since it's its own little thing, you have to speak with Mr. G and get it all setup with him. I will warn you it could take a couple emails to their customer service email before someone actually passes your info over to Mr. G. Once there you just need to take an hour or so to meet with him, fill out paperwork, and then get what you need. We ended up getting 2 sets of 3L tanks. We took one set the first day, then he had a fresh set waiting for us when we dropped off the used bottles.
Bonaire is amazing for rebreathers. We went in drysuits and rebreathers and everywhere we went we got odd looks. But we would do 3+ hour dives and would swim through 3-4 sites during that time. If we found an area we liked, we could just hang out in the area as long as we want.