For the driven element, you will need:
One chassis-mount style N connector (at least 2 opposing mounting holes are needed), with Teflon insulation (not plastic).
Two 1/2" to 3/4" aluminum or brass spacers
#12 copper wire for the folded dipole
A piece of .141 semi-rigid coax for the 1/2 wave balun.
The smooth part of a screwdriver handle makes a good form for bending both the balun and the dipole element.