Would Noahides be required to eat kosher meat because one of the Noahide laws is not to eat blood and since non-kosher meat doesn't soak and salt their meat to get the blood out wouldn't that by default obligate Noahides to only buy kosher meat if they wanted to eat meat?
Your question seems to be predicated on understanding Bereishit 9:4
אַךְ־בָּשָׂ֕ר בְּנַפְשׁ֥וֹ דָמ֖וֹ לֹ֥א תֹאכֵֽלוּ׃
You must not, however, eat flesh with its life-blood in it.
as a prohibition for Noahides to eat blood.
However, Jewish tradition understands this verse differently. Rambam writes in Hilchot Melachim 9:1:
הוֹסִיף לְנֹחַ אֵבֶר מִן הַחַי שֶׁנֶּאֱמַר (בראשית ט, ד) "אַךְ בָּשָׂר בְּנַפְשׁוֹ דָמוֹ לֹא תֹאכֵלוּ"
A seventh commandment forbidding the eating of a limb torn from a live animal was added for Noah, as it says, “Even flesh, life is in the blood, do not eat of it” (Genesis 9:4).
So a Noahide may eat non-kosher meat containing blood. The only issue that needs to be taken care of is that the meat must not have been removed from the animal while it was still alive.