Brian,
Congradulations on your 8. Contact Rocky Mountain Cartridge for your brass, Ballistics products and Circlefly for your wads. Check the NEI site for molds both roundball and conical. T Bland 8 bores are usually 10 dram 3 1/4 inch guns. Use Swiss FFg for your black powder loads. There is a nitro for black conversion load using blue dot if you are interested. I have some 8 gauge plastic industrial cases. Send me a PM if you want to try some in your rifle. I need to swage the base as they are sold with a ring near the bottom of the base to prevent them from being chambered in a gun.
I also have some paradox bullets that cast 1250gr .835 diameter that might work in your gun.You can assemble some loads using a minimal amount of reloading equipment, a mallet, a punch, a hard metal surface, a pair of pliers and some wire.