spark plug recommendation for TFS Streets?

i posted the same question over at 460ford.com hope this question isnt sounding redundant:

i have a TFS STreet Headed 533ci BBF in my Galaxie and from what i read, the TFS heads require AR3924 spark plugs. Weathers getting nice so its tune up time and it would be too easy if the local autoparts store carried these plugs so of course they dont.

what alternatives to the autolites do you guys suggest and how do they compare?

if you need more info about the engine here it is:

pump gas 533, TFS Street Heads port matched to Victor, Solid Roller cam (260/269), MSD 6a ignition, MSD distributor, MSD Wires, 10.8 Comp, 1150 Dominator Carb.

Advance Auto Parts can get'em.