0.047uF is too high a capacitance for a high pass filter
or for use as a treble bleed capacitor... you want something more in the 1nf or less .. the standard is to use a 330pf capacitor but a 390 or 220 wil not be noticably different... Though I dont believe it makes any difference ... you hear that it is alway best to go for the capacitor with the biggest dialectric.. so I would reccommend going for something like this
They are expensive but you wont get a better quality cap for a high pass filter.
As far as the tone control goes all Ibanez use 0.022uf caps ... the in fashion posh cap to go for at the moment is a the Sprague metallised film cap... but these are quite pricey
You could go for a Japanese cap to be more authentic... like this
Tis much cheaper and wont make any difference ot the tone (to us mere mortals maybe EJ could tell)
The pot definatly isnt 76K your right... its a 500k log pot.. I dont know what the significance of the number on the back is ... I dont know who Ibanez current pot supplier is but its probably Alpha...
Hope this is of some help