Get an aftermarket high voltage coil for a Harley Davidson. They are
just like the Honda 600 with 2 wires out. The one I had was chromed,
price is cheap as I recall.
On the other hand if your wires are just too short or are cracked you
can carefully bust off the epoxy, pull out the old wires and replace
them with new wires. There is a spike sticking out of the coil into
the wire, be careful not to trash it when removing old wires.
I use 7mm stainless stranded silicone wire, usually available from
speed shops in blue or Yellow. The 8mm stuff won't fit the coil nor
the caps. Pack the new wires in and force string or something similar
between the wire & coil housing, epoxy the wires again. The epoxy
doesn't stick really well to the silicone casing. You could also try
contact cement or Honda-Bond.
Miles