Can anyone suggest acoustic pickups for around £50-80?

I need a preamp too.

This is for a banjo, so it may need to be a little smaller than for a guitar!

use an SM57 on a stand?
That may be hard to find.
2002 PRS CE22
2013 G&L ASAT Deluxe
2009 Epiphone G-400 (SH-4)
Marshall JCM2000 DSL100
Krank 1980 Jr 20watt
Krank Rev 4x12 (eminence V12)
GFS Greenie/Digitech Bad Monkey
Morley Bad Horsie 2
MXR Smart Gate