Mark_H They ain't cheep - I had a iBeam in a yahama CG171S - pickup was worth more than the guitar. And that is a nice guitar! The cheapest Cherub ()installed undersaddle) is gonna be R500-600 before installation. A real good pickup one with blend is R3k++ before installation.
Or a set of Elixir's for your Squire is around R250-300 and won't need changing for years