[beatle_bayly]

Hmmmmmmm.......sounds a little confusing.

The 'bucket' is the steel contraption that accepts the light. Originally the buckets would have been a gold colour from the cad (?) plating, but they don't have a reflector. Cad replate kits are available, though I wouldn't recommend anyone play with cadmium.

The light itself has the reflective inner surface, be it either a sealed beam, or accepts a bulb. If the reflective surface is dirty it may be cleaned up (except in a sealed beam light) but often the surface peels off and is beyond help.

On the 'euro' type Carellos, fitting higher wattage bulbs often causes premature discolouration of the reflectors, though these lights are short lived at the best of times.

Sounds as though your lights are due for replacement so any generic 5-3/4" glass should fit, but someone your side of the world is better placed to comment than me. Changing the style of the glass will change the 'look' of the car.

Below is a pic of a 'rusty' headlight 'bucket', next to a 'euro' style Carello light for comparison.
On the bucket you can see the overcentre clips used to pull the front trim ring into place, in turn retaining your (US) light. On the Carello it's all one piece and the pivot pins (about which the light swivels for beam adjustment) are formed into the light itself. AFAIK these lights fit NOTHING but Alfettas, which is a right BUGGER !!!!