Littlehen
For what my opinion is worth, I would go with the Toyko strain at this time. Shortages have become the norm after one maker left the market. The Toyko strain has been available out side the US for some time; it is working to pass FDA required testing. Toyko is in Phase 3 Testing which means:
" A phase III clinical trial tests a treatment that worked well for volunteers in a phase II clinical trial. Doctors use phase III to compare the new treatment with the standard treatment. They want to know if the new treatment is better, has fewer side effects, or both. So they put volunteers in different groups. The volunteers in each group get a different treatment.
Phase III clinical trials can take many years. They may have several thousand volunteers. These must include men, women, and people of different ages and ethnic groups, if possible. This helps doctors learn how the treatment works in different people.
If a phase III clinical trial shows the treatment works well, doctors might begin using it with people outside the clinical trial. For example, if they learn that a certain amount of exercise lowers your cancer risk, they publish a report. This shares the information with other doctors. If the researchers or sponsor learn a new medicine is safe and effective, they can ask the government to approve it for people to use. In the United States, they ask the Food and Drug Administration (FDA). The FDA looks at the results of the clinical trial's phases. They approve the treatment if the results meet their standards."
www.cancer.net/research-and-advocacy/clinical-trials/phases-clinical-trials
Best
Jack