I scoured through every forum, WRDS and Google pages but all I find is SAS codes to merge the dataset but no information on where I can actually obtain the linking table.

I'm hoping to match PERMNO / PERMCO (which one is more preferable to use?) data from CRSP, to GVKEY data from compustat.

I'm at my wits end at this point and I spent the whole night looking for this mythical table. Any help would be very appreciated