Originally Posted by gfk_velo

Haha, yes, tell me about it ... :-D

The lever body you need is EC-RE300.

It's the lever body ex rubber hood, clip, brake lever and pivot pin.
The "excluded"parts all transfer directly across from your existing lever.

When knocking the pivot pin out of the existing lever body (flat ended punch or 4mm dia rod needed, plus a light hammer) just be careful to
a) support the body of the shift lever as you do it and
b) the pin only goes in one direction, from the "inside" towards the "outside".
It just taps out, there's no locking screw etc.
It usually needs a fairly firm blow to shift the pin, they can be in there quite tight.