Fastener quadrant I.D. question

[Ricky]

Howdy,

I'm looking at some airplane modification drawings that have ya, ass,
xa, and xl in the NW corner of the fastener quadrant. I know that
quadrant is the fastener I.D but I'm looking for a website where I can
do something like punch in the letters I'm seeing and be told what the
fastener callout is.
I do have an extensive fastener I.D. book on order but until it gets
here does anyone know of a site similar to what I described? I've just
spent the better part of an hour looking & will continue but maybe
someone here knows of one off the top of their heads.
I'll post this on the homebuilt group, too, in case anyone there can
help.

Thanks,

Ricky