That links shows the type of twin wiper stalk assemblies for a MKIV Mini from 1976. I'm pretty sure they also got fitted to early MKV Minis too, but the type as fitted to you're Mini got fitted from late 1985.
I don't know if it'll fit or work, but I do know that those kind of stalks are usually reversed to whats fitted to you're Mini. So the older MKIV type had the wipers on the left and indicator on the right.
But those seam to be set in the later wipers on the right and indicators on the left positions which is damned odd? And those connectors are also an oddity too, because the older MKIV type stalks (as supplied by DSN in the image below) use the conventional pin/plug connectors:-

Anyway try contacting this company below, because they used to sell lots of new/old Rover Mini stock and may have the correct complete assembly. But I reckon you only need to replace the part that you've broken?
Mega Modz LinkAnd i've checked a few other Mini specialists like Mini Spares and DSN and they want silly money for the separate items, never mind the complete assembly!
But i'd check the fuses too and as you can see, you're indicators are on the same circuit as you're Brake Lights, Reverse Lights & Rear Screen Demister.
Here's a full list:-
Fuse & In-Line Fuse Information LinkApart from that it could be you're indicator flasher unit or the hazard warning light switch is playing up and that switches off the indicators when the hazards are on. And it's known to sometimes keep the indicators switched off permanantly when it fails.
Edited by taffy1967, 02 March 2007 - 02:33 PM.