I went and check up the timbuk2 padding at taka and cine but its more suitable for sling bag and not bag pack. So still looking around whether any suitable for bag pack
Bag pack? u can also go to Army market to see.
They are selling pads for bag pads. it used velcro straps to fasten the pad (2-3 velcro straps). it looks pretty comfy too... v thick padding.
i saw black and army green ones, but didnt ask for price. it shld be pretty cheap too. shld be cheaper than $9.