Found the HSN ones, but not the LSN:
https://www.nitrohouse.com/Picco-6070-0-Rings-for-Main-High-Speed-Needle-OFNA-51402_p_8793.html
Parts explosion:
http://www.manualsdir.com/manuals/650195/ofna-racing-picco-26-max.html
Worst case, you might be able to find an alternate carb that is still...