Hi Zeno look at Madisound's Eminence 151311 @$79US
pretty close to your Visaton
fs/qes=119.375
fs=38.2,qes=0.32,qms=7.73,vas=299l,re=5,xmax=5.5mm, mms=60.1g,BL=14.9
Le isn't specified but I'd guess around 1mH - goes out>3Khz on axis as direct radiator - am looking at it for inexpensive Karlson driver
Freddy