As far as I have found the only way to mod it is to fabricate something yourself. I have been looking in to this myself quite a bit and a couple of people have created things, including Greg Pullman. The only reason they havent gone into production is because there isnt enough demand from them so it wouldnt be worth anyones time to do unless the price was really high. Id be happy paying 50 bucks but for some thats too dear. Someone may be willing to produce them if there was keen interest from people here on CS.