Quake Basses have strings specifically wound for their 39.55" scale length. It is unlikely they will fit any other custom made bass.

5 string tunings
B set / A set / F# set / E set

5 string sets - $50

Heavy 5 string sets - $55+

Singles - $12

Heavy Gauge Singles - $17

Strings meant for extreme low
tunings on standard scale
basses available soon.