Hi everyone! I recently snagged a pair of Altec Model 5s, only to realize later that the woofers had been swapped. The cones are blue, dustcaps are tan, and the following numbers are stamped onto the bottom: "841-1019-100" and "137 7409" (see photos). From what I can tell, the impostors appear to be from a set of Marantz Imperial 7s. The surrounds are shot, so my question is: are these worth refoaming and using or will these speakers sound terrible with the Marantz drivers? I haven't been able to find any information on the specs for the Marantz or Altec woofers, so I can't do a comparison. Any help would be greatly appreciated!