Broken gear lever

Help! The gear lever on my 2a has snapped clean off right at the base - anyone know what's involved in replacing it?

4 bolts, and a new lever

it really is that easy but be careful the selectors are in the right position before sticking the new one back in. get a screwdriver and put them all level

Cheers - thanks for the advice. I wasn't sure whether it could be done from the top of the selector box, i.e. without dropping out the gearbox. It's stuck in first at the moment so I will take care with the selectors as you have advised. Seems easy enough to get hold of a replacement. Thanks again.