Have you worked with the UCOA? There is a spreadsheet version which includes multiple workbook pages, and it cross-references 990 lines, OMB, United Way, etc, by function. Here's one:

https://www.compasspoint.org/sites/default/files/documents/SampleChartOfAccounts.xls

I think it's old. You should be able to find one that matches the recent 990 line #s.