I am not familiar with those tepin seeds, however I have a Tepin plant that was grown from "wild" stock. She is 13 years old and has been in my front flower bed for the past 10 years. She dies back each winter and comes back healthier and bigger each year.
I would gladly send you as many seeds as you need...plenty of tiny round pods on the plant righty now.
If you are interested, message me with the address you want them sent to.
AJ