I got a dead Elu when I bought all the tools from an old woodenboat shop. I took it apart, noted that the rotor winding was shot and the brushes and brush holders were just about exploded to pieces.
I went to the local service shop, showed the parts and they gave me new rotor, brushes, brush holders and bearings. It got a bit pricey, but still it was about one third of the price of a new one. Assembling the parts was easy, and the router has worked purrfiktly ever since.
Only problem I would see on your router is the molten plastic: if the machine has heated up enough to soften the plastic, the surfaces where your bearings should fit into are most probably deformed. As a router has so high revs, even a very small error on the bearing alignment will cause heating and/or vibrations. So even if you would be able to replace the components, there is a possibility that the new components won't last very long.
It looks a bit scary. But then again the blown brushes looked pretty scary as well.
Pekka