...get hold of one from an early model . . . early ones are made from steel and are stronger.
I'll second that.
The Alloy body of the mounting block on mine had split, due to corrosion.
When I removed the block and mounting from the gearbox, it was clear it was totally knackered.
The casing crumbled into three or four pieces when I tried to undo the main bolt, and I had to cut the bolt and use a club-hammer to remove it from the mounting, it was so corroded.
My local Fiat dealer quoted me over £100 (don't know exactly how much as my ears went into auto-shutdown when they heard the 'hundred'), as did the only other local place that listed them.
Took a gamble with a used one off ebay, was off a '97 1800 16V Brava, which looked to be pretty close.
It fitted . . . eventually!
The holes for the mounting were slightly out, but a little filing/slotting sorted that.
The anti-rotation ribs on the boss were also 90° out, so I had to cut fresh slots in the Gearbox mount fitting.
Also, the Brava uses a 12mm bolt, whereas the Multi's is a 10mm, so I had to get a new bolt, and drill out the mount to suit.
Soon after, someone informed me about these guys...
http://manodalys.lt/product.php?id_product=1543770169
They are absolutely brilliant, couldn't be more helpful if they tried.
The prices on the website show as £s, but are actually the prices in Lithuanian Litai.
So that Mount is approx £30.
P&P is very reasonable too.
Worth firing the guy an e-mail, he may be able to supply a Steel one that matches the Alloy one.
I'm sure, from all the research I did, that some Alfa Steel mounts are the same.