Sorry, They are Beolab Penta, MKII. 1992. Getting signal from a beomaster 4500 and Beovision 3-32.

Hi all, first time posting on the forum. Been lurking in the background awhile now. I have just acquired a set of penta II's and they need some work. First off, they need midrange foam as usual. I have found a kit on the bay for 42, has anyone ever tried this? is it worth it? or should i get OE foam from B&O? Secondly, Only the center midrange