Re-use an old box

Hi,
I have an old 3 way old loudspeaker with missed bass driver. I cannot get same driver because in no longer available. Can I install a new bass driver and try to adjust the bass reflex port? Is that possible?.
Thanks for your help.
Regards.
 
Hi Jeff,
It is an old Talmus box I think with stock drivers because there is only a number and impedance. Tryed to get informtion in internet but without success.
In guitars cabs we just replace the drivers without trying to match with the box. But I know this is totally different.
Even increasing or reducing the lenght of the port will not help?

Thanks!!