Mission 720

Hi all. I've recently picked up a pair of AR55BX speakers in great condition. Unfortunately the original bass drivers have been replaced with some generic drivers, the originals had foam rot and were thrown away by the previous owner 😞 My question is what are the original AR and replacement Tonegen part codes, and in which other AR loudspeakers were these bass drivers used? Many thanks in advance!

Hi - anyone know of a source at reasonable price for 2-off tweeters 1210068-OC ? As used in AR6BX, AR8BX and AR18BX. Many thanks in advance.