'Hogyoku' certainly hits all your marks - it is a very handsome tree and with rather unique fall coloring. Typically described as pumpkin orange :-)

'Sango Kaku' or the coral bark maple routinely develops peachy-orange fall foliage in my area, plus offers a lot of winter interest. Leaves are not large, however.

Another to consider is 'Saoshika', which has larger leaves, orangey-gold fall color and a translucent appearance when backlit.

Sorry, I can't help you with any local suppliers :-) If no response here, try your regional forum.

Here is a link that might be useful: 'Saoshika'

Check out Acer palmatum 'Duncan & Davies'. This will be available in spring at Maplestone Ornamentals.
Also go to the Japanese Maple page and check out the Japanese Maple Reference Chart for comparing height and seasonal leaf color.

Here is a link that might be useful: Maplestone Ornamentals

Acer palmatum 'Aoyagi'
is a possibility

Here is a link that might be useful: Acer palmatum 'Aoyagi'