As stated previuosly I renovated my GS401B speakers. Pots, caps, wiring and stuffing.
I used Tontine Thermal Sound batts. Brilliant and don't itch like the horrible original fibreglass material.
I have Half to 2/3rds of a pack surplus. It's free to a good home in Perth Western Australia.
Reply asap if you want them.
Cheers
George