i got some autogauge smoked ones that were in mine - £35 a gauge, not the best but didnt cause me any issues.
Oh and if you after an AFR - make sure is wideband and not narrow band.
you will also need a t piece for oil pressure/temp to go into the bottom of the block, or grind the power steering bracket down/away to fit a sandwich plate.
ive now got some defis - look awesome and ill know they do job....remember a gauge is not just for show - its for life (did you see what i did there, got rid of the dog bit lol)