I just recently posted for 2004 st1300 left-hand muffler but also maybe some after market pipes to get me out of trouble cheers again Brian
After market pipes I can help with; a pair of Delkevics, some details here:
https://ozstoc.com/index.php?topic=14217.0#lastPostIn overall good condition, except for one of RHS mounts which took a very minor hit (in an "off" in March, earlier this year on the Great Alpine Road) but it's a chrome plated mild steel band which I've straightened since removing the pipe. Let me know if you want some pics, they're probably worth a 1,000 words.
Similarly, an inspection is worth a 1,000 pics. I'm in Greensborough, 10 minutes from the eastern end of the M80.
Pity I didn't see this post earlier, just got back from visiting family at Woodend, presume that could've been convenient.