No the 999 Uno had the same 32tlf as the Pandas, ICEV is off a different engine and a completely different carb. How much might be interchangeable I don't know but things like gaskets & diaphragms would be different, venturi don't know, jets some maybe. It'll be a case of getting lucky some parts are the same rather than there's the odd difference.
If you're looking at fitting it rather than just cannibalising for parts, offer it up and see, if you can get it on and connected up, it'll probably run. How close the jetting is depends really which engine it came off, carb from a 1.3 or something is likely to be a bit out, might give you a bit more poke even but not great for squeezing through at MOT time. The challenge will be getting the fuel inlet, choke and throttle linkages all to marry up and persuading it onto the inlet manifold.