Steve:
I didn't read his post carefully enough. I though he already HAD the 10A meter.
I don't know that analog panel meters have any standard rating, but every digital panel meter I've seen has always been based on a 200mV full scale volt meter. You know, the 0-1.999 4-digit type.
Both ammeter and voltmeter are the same except the input wiring. The voltmeter is wired as a 2 resistor voltage divider, while the ammeter is just a shunt resistor. Otherwise, both meters are identical 200mV volt meters.
Copper pipe would work! Or tie into a chunk of the house plumbing and heat your water while you're plating!
Seriously, a large low resistance might possible without too much expense, if you can find the right value parts. I once racked up some 15 ohm , 50w power resistors (the gold aluminum heat sink type) for an amplifier dummy load. 16 of them gave me 800w of dissipation. They were cheap surplus, 50¢ each.
If you could find them in 1 or .1 ohm values, a rack of them would work, and give you a nice hot plate to boot!
Sean