Here's a deciduous Azalea.

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Here's a picture of an orange Rhododendron called 'Whitney's Orange'. I haven't fooled with with the picture, but the computer did. It's a lot more orange than the picture shows.
Mine is about 8 ft. tall. I've had it for over fifteen years, maybe twenty.
Mike.....senile
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Most "orange" elepidote rhododendrons still have pink undertones, even the famous "Whitney's Orange", at least according to the ARS. (see link) And most of the ones they call only "orange" are definitely not...

Might you have seen the lepidote "Trewithen Orange"? Although it is in commerce in the PNW, those old English hybrids seem more common in gardens on the "Commonwealth side" of the border, not surprisingly. It is a clearer orange than all but a few elepidotes.

Here is a link that might be useful: http://www.rhododendron.org/alphalist.asp?Color=Orange&Genus=R

In a climate that is even more salubrious than the US PNW, and with access to all the world's hybrids...you can see there is a relative paucity of true orange rhododendrons.

Rhodyman's Gibraltar would look more "orange" to the layman than any of them on my link!

Here is a link that might be useful: http://www.woodburyrhododendrons.co.nz/catalogue_orange.html

Looking at true rhododendrons (not azaleas), the most common orange is Mary Belle:

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Midseason elepidote, -15F, medium height. Quite popular.

Thank you so much for all the suggestions. I am going to try to get my hands on Exbury Gibraltar.... this seems like it might be the right one. Your help is much appreciated!