[url=http://www.forgeworld.co.uk/en-GB/Contemptor-Pattern-Volkite-Culverin]Forgeworld have started pre-orders for the Contemptor Pattern Volkite Culverin.[/url].
Standard £9.50 each, and they're twin linked to boot.
Volkite - because reducing swathes of your foe to ash is always good for a laugh.