Great Models has a beautiful set for the IV J Late (hull only). Since the hulls should be the same, or very similar, you should be able to use them. They are pricey, though, at about $30. If you want to see what the brackets look like, take a peek over at the IV group build, on page 18, near the bottom. I posted a couple of pics of the left side of my IV after I mounted the brackets.
Good luck
Bill
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DML M4A2 Red Army
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-- There is a fine line between "hobby" and "mental illness". (Author unknown)