I don't know whether you can use the Tasmanian State of Origin jumper for a Tasmanian AFL club. The Tasmanian representative jumper is just that and should be reserved for that purpose. Just as the Adelaide Crows have their own jumper, based on SA state colours, but quite separate to the the SA representative jumper.
So you could certainly use the Tasmanian SOO colours as inspiration, but in a different format. Something like the NSW-ACT Rams jumper as a template, but using traditional Tasmanian colours in that template would make for a great, traditional looking footy jumper.
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Say for example, a predominately dark green jumper with dark magenta to maroon yoke, with primrose yellow chevrons (over the dark magenta yoke). Primrose yellow number, cuffs and collar. Dark green shorts (white shorts playing away would look fine with this strip also). Perhaps you put 'the map' symbol on the back of the neck to pay homage to tradition (as Brisbane and Sydney do on their jumpers to Fitzroy and South Melb respectively).
Then your alternate strip clash strip could be a lighter shade of green with say the yellow and magenta switched around, but on the same template. All hypotheticals of course.