Excalibur Custom Carts in Brampton, Ontario has fair battery prices, all 6 volt GC2 footprint and in Canadian Dollars.
A no name 205 amp @ 115 dollars, Two Excalibur brand 215 or 230 amp at 117 and 130 dollars.
Trojan T-105 225 amp for 192 dollars. I got the Trojans.
They also sell 8 and 12 volts sizes.