M&K SW-50 OR SW53 GRILL

Question

I am looking for a grill for m&k sw-50 or sw-53. I bought one speaker from Ebay and bought another one at local store. One speaker does not have a grill. Both speakers are sw-50 but I think sw-53 grill might work.Will you please help me where to find the grill my speaker since M&K are out of business I do not know where to go.Thank a lots...Paul