Yes, I have just had a batch of brand new rubbers made to the correct section. See the thread under General Chat -
viewtopic.php?f=41&t=2892PM me if you want a set.
The Allegro radiators are very difficult to find these days, your best bet is ebay. A Metro Mk1 rad is very similar, but doesn't have the take off for the header tank (that comes off the thermostat housing on the Metro). A lot of Mini race cars use front radiators derived from the Metro Mk1 rad, so aluminium versions are available.
The Mk2 headlights are also Allegro. The same light units were also used in Hillman Hunters and Ford Capris, albeit with different frames. Ebay is again your best bet, I found a pair of new/old stock headlights on ebay for Desmond Gorman's Mk2 last year.