No, actually. The point of getting a BMP-3 is because I think they're cooler than Chimeras, so converting them would defeat the point, I believe.

Also, notably, the layout as well as some other features is very Chimera-esque.
http://www.army-guide.com/eng/product120.html

Note the barrel bracing for the main gun, then note the funny barrel-bracer on the Chimera's main multilaser.