05 T100 breather pipe seal

Have a look at Triumph Clothing, Triumph Parts and Triumph Accessories from World of Triumph in the parts section. There will be a schematic for the bit(s) you may need. You can order from them direct apparently, though I would ring them to make sure you get the right bits, rather than online, unless you're sure!

Jack Lilley are also very good on mail order parts. :upyeah: