Sounds like a very cool toy. I'd own one except for the PITA cleaning factor, but still woth it. My friends who do BP seem addicted. Does it get you out of Aussie gun laws? Here in the states they aren't classified the same way as modern firearms. Is that the case down there?
FQ13
PS as far as lead, look to fishing catalogs. There are a quite a few that sell lead for folks that want to make their own jig heads and sinkers. Likewise, hit your local scrap yard. Just wear a respirator if you start hack sawing pieces down to size.