HELPPPPPPP please!

I have a Fiat Bravo SX 1.6 (R) reg 1998.

I have had a dodgy connection behind my steering wheel for a while
now, something I have managed to bodge but now it really does need a
proper fix as it is getting worse and dangerous!

It started with a similar problem to that of the indicator stalk
problem, where the lights and heater cut out. I changed thsi a while
ago and when doing so realised that it wasnt the unit that was a
problem but one of the set of wires that plugs into it. The left hand
black longish plug with about 5 wires in it has lost its 2 plastic
clips which hold it in place, so the connection has become dodgy. I
managed to solve this (or so i thought) using gaffa tape.. however the
connection must of still been not quiet right as heat has now made the
black plug melt slightly around one of the contacts and so the
connection is now even worse! Gaff tape will no long solve my problem!

I knew I would have to fix it properly at some point and that point
seems to of come!

My question is, where can i get hold of one of these connection
blocks, I spoke to my mate who works at a fiat parts place and he
doesnt seem to think they sell that as a spare part, I have considered
scrap yardsm but wouldnt know what to call the part properly to
describe it!

Any healp/advice would be really really helpful.. i is quite scary to
be driving at night on the motorway when your lights and fan go off
and my wife and 2 year old also use the car to get to work!!

Thanks

Tom