I did recently have John at Focal Point re-cement the rear elements in the front cell of one of my Mamiya Universal lens'. It was a three element Biogon design. Mamiya/Sekor 75mm Press. Good work, and fast.
I did get in touch with him a short while back. He was moving his business home... closing his shop. He sent out a message that he was going to have his business fronted by someone with a retail space in his town. I caught him one day on his phone number... he picked up. He had my AE100 lens and had repaired it. He sent it back to me. That was about 3-4 months ago. Have not tried to contact him since, but he said he was going to continue with the same telephone number.
PM me if you want it. Have heard since nobody is having much luck raising him. HOpe it all settles out.