@Sam Gamgee thinking how you mentioned; ‘out of the big jar’, this might of been a house blend, or a bulk blend of some kind.
But, at least knowing it was named Irish, being stereotypical, a lot of Irish blends follow the same blending, of cream, vanilla, whisky, various fruits, etc.
So, all might not be 100% lost, you might not get all the way there, but I’d simply be on the look out for Classic stereotypical Irish blends is all, and you might just find, something somewhat similar.
Uhle’s has a blend, ‘Irish Aromatic’.
House Blend Pipe Tobacco for Out-of-State Residents. If you live outside of Wisconsin, please purchase off of this page. If you live in Wisconsin, you must purchase off of the Wisconsin Residents collection.
uhles.com
Peterson’s and Dan Tobacco, they have a few Irish blends to try next.
Have fun hunting!