The builder's name is John Amo. He's shown in the plaid shirt in your second picture.

Unfortunately you can't get ahold of him anymore because he passed away a couple years ago.

https://www.fredwoodfuneralhome.com/notices/John-Amo
.
When he passed, his shop and everything in it was liquidated. Here is a link to the empty shell. Cut and paste this to see the outside of his shop.

https://www.google.com/maps/uv?hl=en&pb=!1s0x8824b5a3697d2bd1:0x2f21485b56a5f2f4!2m22!2m2!1i80!2i80!3m1!2i20!16m16!1b1!2m2!1m1!1e1!2m2!1m1!1e3!2m2!1m1!1e5!2m2!1m1!1e4!2m2!1m1!1e6!3m1!7e115!4s/maps/place/JB%2BAmo/@42.4015479,-83.276524,3a,75y,84.36h,90t/data%3D*213m4*211e1*213m2*211sXZfgDL038dNBcrOBvNG_ug*212e0*214m2*213m1*211s0x8824b5a3697d2bd1:0x2f21485b56a5f2f4?sa%3DX!5sJB+Amo+-+Google+Search&imagekey=!1e2!2sXZfgDL038dNBcrOBvNG_ug&sa=X&ved=2ahUKEwiUg_eIop3hAhWDzVkKHafED4gQpx8wEHoECA4QBg

I only met him once but I got to see his shop and speak with him one time, and I thought very highly of him.