Is Trimix available in US?

Could you please clarify for me if Trimix is indeed accessible for purchase and use within the United States? I'm interested in understanding the availability and any potential restrictions or regulations that may apply to its distribution and consumption in this country. Additionally, if there are any specific brands or formulations of Trimix that are commonly found in the US market, I would greatly appreciate any insights you might have on that as well. Thank you for your assistance in addressing this query.