Anytime ( 3/8 inch ) digital gauge glue-on receiver (suits UP! Afinia, etc)
Simple receiver that can be glued (perhaps bolted) to plastic cover that covers extruder, to enable the seating of a digital (or analog) gauge with 3/8" stem.
BTW Guage in photo is $70 from http://www.amazon.com/guage/dp/B001DC96YK/ and has a SPC digital out, although nobody knows how to interface with it.