5 Speed Shift Knob Needed, 300E

[Springbank]

Finally got my 5 speed Euro 300E back from the shop, and it's running great. The problem know is that the rubber shift knob is about to split apart across the top.

Are these available anywhere? Will one for a automatic transmission fit? If it will, any tricks to replacing it?

I'm afraid I'm going to be driving down the road one day soon, and end up with half a shift knob in my hand.

Thanks for any help.