I will be in Oakland/Alemeda tomorrow and I have probably another 200 (maybe less) plastic ones left. PM me for my phone number and we can arrange where to meet. There is a slight chance I can not make make it, just slight though.
I might meet you there before it starts if that's OK. I assume you'll be there setting up. I didn't get a ticket since I thought I'd be out riding, so I can meet you outside. Thanks for following up on this. I'm sure you've been busy.
I know this is not an elegant looking frag plug, but I have been using plastic screw anchors and drilled holes in a 1/2" sheet of acrylic to hold them. once the frags have encrusted the frag recipient may trim the plastic down and super glue the plug to the rock. in a few weeks if all goes well you will not see any sign of the plastic.
I was using the ceramic plugs from the filter guys for a while. then I saw a local store using the anchors, I thought wow, that will save a lot of money and you can color code them