L Smith wrote:

we got to
wondering how far the
various strikes we were seeing each afternoon were from us. This led to
the question of
whether stikefinder equipment is even available for non-aviation
applications (ie either
car-mounted or portable); if so, what's a 'minimum-equipment'
configuration (portable GPS,
etc) that would put the information into an accessable and meaningful
form,

I'd put the minimum equipment configuration at an eyeball, eardrum, and
reasonably calibrated '1001, 1002' count rate. Gives both bearing and
distance to pretty good accuracy.

and what would
it cost?

It was included as part of the standard equipment package.