I would use metal core spark plug cable and 5K plug caps.
I think it's 7mm cable but I might well be wrong about that.
The Dyna coils have plug cable connectors like on old automotive distributors, so you will need 4 compatible connectors and sealing boots. You can just buy a cable set for an old 4 cylinder car with the distributor connectors molded on, but the cable will be graphite core.
Easiest, of course, is to get the cable set from Dyna; this comes with two long cables with distributor caps on both ends, you cut them to make 4 one ended cables and add the plug caps.