There are any number of suppliers other than the sole sanctioned one. Search Alibaba. Assume you will pay a fraction of what you'd pay the sanctioned suppliers, but you will also have to run a sample via a LC-MS analysis to see that you are in fact getting what you think you are getting. This is all pretty easy to arrange, and works for just about any well known compound, peptide, etc.
If you are willing to do that, one would hope that you are also willing to (a) actually assess the results with the more robust quantified self metrics, rather than just hoping and feeling, as so many people do, and (b) take full responsibility for any harms or legal issues you cause yourself in the course of experimenting, as so few people do.
The detailed guides section here contains a couple of posts that walk through this process for a couple of other items, but the same general outline applies in exactly the same way: