late to the party but
if you are still trying to locate a source
for laser cut pinholes try william christiansen
i bought mine from him ages ago, he's extremely nice and helpful!
8 oz. water • 4 slightly rounded tsp coffee • 2 tsp. washing soda • 1000 mg Vitamin C
DONATIONS FROM THINGS SOLD, SEE MY BLOG FOR DETAILS
( both are active links )