Very wise. I have just spoken to Partsworld, who deal directly with Italy. The top mounts are no longer in production, and Alfa Romeo have no intention of procuring any more. There is no stock left for the LH bearing (part number 60629998), so once all the retail stocks are gone that's it!
Looks like even reasonable second hand ones will be soon sought after, I'm only doing mine because everything else suspension wise is getting renewed so I thought I might as well do the top mounts while I'm at it.
The days of binning the old parts are gone, if the mounts are reasonable they will go in the shed with the rest of the parts that have been stripped off.
I'm taking a week off work to replace the following with new parts,
Front subframe, shock absorbers, Springs, drop links, track rod ends, top mounts, anti roll bar and subframe brackets.
Front and rear exhaust manifolds, maybe the cat and if time allows replace the cam covers with red detailed powdered coated ones that have been in the loft for a year.
If anyone is interested in the parts I strip off i will post a list of service like bits.