is it a soft rubber or a hard like folded paper surround ?
if it is a soft one there are some options but keep in mind it will be
to some degree different. also you would have to get the Thiele & small Paremeters of the driver.
wich are
FS =
Re =
Vas =
LE =
Qts =
Qes =
Qms =
Sd =
SPL 1W/1m =
Xmax in mm=
you need to know also
is it a Bassreflex or closed
and the Volume of the cavity in Liters.
then I can tell you what will work.
if the original driver doesent cost a fortune it is probably less of a drag then finding something fitting.
I build speakers for 25 years and if you know where and what its easy otherwise ......
Good luck
