Is the anywhere to cross reference a part number to a year/make/model of mopar ??

I believe there are “Hollander” (sp?) books out there that the junkyards used to use for that exact purpose. Find someone with that or get one , if looking on the internet doesn’t get you what you want. They are pretty massive books and prob expensive?

Here you go: Expensive and 1200 pages:

You can download many parts manuals from mymopar.com and look up the part number in question in the numeric listing at the end of each book.

https://mymopar.com/parts-manuals/

That would be useful if you could do a search in the PDF. Having the part number listed in the back just tells you it's in the book somewhere.

No: since a particular p/n may span many years/models.
Parts books are offered for particular years.
A particular bolt or nut could span decades of years.
But could be done, I guess, if you wanted to somehow "combine" various years into a "mega" database & do boolean searches.
No "easy" way out for what I perceive is your inquiry.

Not just "somewhere" but the actual page the part is listed on along with its nomenclature and application.