No. of routers carrying full routes?

Where can I find/how can one estimate the number of routers carrying
the full Internet route tables?

I need to convince someone that singly-homed customer route flaps/
withdrawals should *not* propagate beyond our AS. I've found some
discussion of this in the July NANOG archives, and talk about cisco
floating statics, etc... and that "one-way" traffic is insignificant.

I haven't upgraded to 11.1 yet, but my network
is simple enough [read: not redundant enough?] that all my customers
are singly-connected; in that case, statics in my border routers
pointing to my customer edge-router seems to make fast install moot
for now.

Finally, is there a *searchable* archive of NANOG anywhere?