Here are a just a couple sources of Clanranald tartan which can easily be obtained by any kilt maker on this forum:

Lochcarron:

Macdonald Of Clanranald Ancient Tartan (medium weight)

Macdonald Of Clanranald Tartan (Strome weight)

House of Edgar:

Macdonald Of Clanranald (medium & heavy weights / and Old & Rare)

Happy hunting!