a'yup - common question - more than a few threads on this - he seems to go silent periodically
i got a set from him several yrs ago - only after i finally drove over to his shop (which on several visit attempts was closed) (only ~20 miles from me)
IMHO - if he spends time answering emails, he doesn't get the shop work done - so he just ignores 'em
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914 & 914-6 parts FS 03-2021 
www.tinyurl.com/2pmpmv8y
911 parts FS 2022
https://tinyurl.com/911-Parts-FS-LCM