As stated, this has been discussed before.
Production of a Yoyo is not just the design; But the materials used and the accuracy and repeatability of the manufacturer.
Context; Best USA bimetals - #82 by Pun1sh3R
Ultimately it comes down to Quality AND price. In todays age of “Instant Gratification”, who can get it to me “Now” at the cheapest price?
Unfortunately the US can not support this at this time.
Have Fun.