Inconsistent pluralization of "golden fleece"

[Soleillante]

Do you happen to have an exact quote from the NPC so we can better debate whether "fleece" or "fleeces" would be appropriate for their dialog?

As follows (emphasis present in original text):

You know where to get snurble blood, don't you?
...Snurbles, you say? Wrong! You get snurble blood from golden fleece! Don't think about it—just go to the Burning Wall and kill five!

I suppose I should clarify that I am and was aware that, in its customary use in modern English, "fleece" is uncountable, and that it regularly pluralizes as "fleeces" when used to mean "types of fleece".

I just think having "fleece" be an irregular plural in this context feels more natural. (And apparently the author of Helmhart's dialogue agreed.) I have no concrete idea why I think that — perhaps it's due to buttressing by zero-inflection plurals for other animals (deer, sheep, moose, etc.) and/or the rhyming plural geese?

No, it doesn't matter that golden fleece are classified as voidsent and not beastkin.

[Iscah]

and/or the rhyming plural geese?

Would that make the singular creature a golden flooce?