Bounding Box Center Multiple by Michael
https://moiscript.weebly.com/uploads/3/9/3/8/3938813/boundingboxcentermultiple.zip
+ VClone by Max SMirnov can do that! ;) (and the length's vector can give orientation & size of the object "remplaced" ;)
https://moi3d.com/download/scripts/max/vClone.v.1.0.2014.01.26.zip

or + Copy to Points By Michael if you don't need size & orientation
http://kyticka.webzdarma.cz/3d/moi/#CopyToPoints

Oooh thanks Frenchy - I haven't played with these before - looks like they may be of use to me :)