12-03-2016, 05:15 AM
If the spider in the model 90 speaker looks like that then it has already been replaced, and it is an improvement over the original ones which were a solid cardboard disk. In answer to your question I don't know where you could buy a new spider like that, but you could make one easily enough with some stiff cardboard of the right thickness.
Regards
Arran
Regards
Arran