Anyone know of any mid-sweepable preamps that has a wider sweep than EMGs? I believe theirs go from 300Hz to 3KHz. I'm looking for something that could go down as far as 100/150Hz. I'm using the stock Ibanez Vari-Mid but the pot's shaft for the mid control/sweep got bent and I can't find anyone who has replacements. It's a weird value - 20K/ganged dual 100ks. Thanks.