Need advice on fe167e driver replacement

Hi! I’m fairly new to diy audio and new to this forum. I got a pair of diy speakers from my brother for free but one of the fostex fe167e drivers is damaged, as in no mid or bass. I’m not sure what the cabinet design is specifically, but from what I have gathered based on taking out the drivers, it seems to be a mass loaded transmission line, as in this website Fostex FX120 DIY ML-TQWT (Transmission Line) Speaker Project. Is there a current fostex offering or anything that I could get my hands on for fairly cheap in the US market? Thanks!
 
The closet you ar egoin gto get is the Fostex FF65wk. ML-TLs are fairly tolerant, they use the same basket so will drop in.

I think it is better sounding, you will need to get a pair.

ff165wk.jpg


Fostex FF165WK 6.5" Full Range

dave