Several in-ground sprinkler parts available:
PVC connectors, mostly for 1: pipe, $1 each,
In-ground sprinkler drain plugs with 1/2" male connection, $2 each,
Oscillating and pop up sprinklers, $3 each,
Bubbler and shrub heads, $2 each,
Risers, all 1/2" thread, $1 each
Compression clamps, $.05 each