I think I got mine through these guy's
www.tradesure-quote.co.uk will have to dig out my policy tommorrow and check.
I pay just over £500 a year and am covered for public liability & all vehicles (including Motorcycles and my privately owned cars / bikes) upto a value of £25K. The only problem I think you may have is your age mate.
Most Insurance Companys that deal in Trade Insurance insist on all drivers being over 25yrs old and have held a full licence for at least 2yrs, but give them a try.
