Particularly after these cultivars- some of them are proving impossible to find:

Acer palmatum:

'Aoyagi'

'Higasa yama'

'Sagara nishiki'

'Sango kako'

'Osakazuki'

'Hogyoku'

'Omure yama'

Acer japonicum:

japonicum

Acer shirasawanum:

shirasawanum

'Aureum'

'Autumn Moon'

'Palmatifolium'

Check out my exchange list for swaps. (if you're willing to swap any of these I'd be very generous in return- anything but our 100 year old tree fern. Even cuttings that I could graft would be great)