Keep in mind that those maple seedlings are not the cultivars but simply Acer palmatum.
https://www.evergreengardenworks.com/availabl.htm is a great place for rooted cuttings which will give you the cultivars.
Here is a current list:
Acer palmatum
0500 A. palmatum seedlings2 3/4 inch $15, 4inch $25 , 1gal $40
0501 A. palmatum (small leaf dwarf)4inch $27, 1gallon $40
0502 A. palmatum (small leaf, small seed) 2 3/4 inch $18, 4inch $27, 1gallon $40
0503 A. palmatum (Ryusen seedlings) 2 3/4 $18, 4inch $27
0508 A. palmatum 'Ao Kanzashi' 2 3/4 inch $25 , 4inch $35 1gallon $55
0531 A. palmatum 'Bloodgood' 2 3/4 inch $25
0534 A. palmatum 'Burgundy Lace' one gallon $55
0535 A. palmatum 'Butterfly' 2 3/4inch $27
0544 A. palmatum 'Coonaria Pygmy', 2 3/4 inch $35
0556 A. palmatum 'Fall Gold'2 3/4 inch $25
0581 A. palmatum 'Ibo Nishiki' 2 3/4 inch $25 , 4inch $35 , 1gallon $55
0583 A. palmatum 'Inabe Shidare' 2 3/4 inch $35
0595 A. palmatum 'Karasugawa' 2 3/4 inch $35
0598 A. palmatum 'Katsura' 2 3/4 inch $25
0601 A. palmatum 'Kiyohime' 2 3/4 inch 2023
0639 A. palmatum 'Mure Hibari' 2 3/4inch $27 Sold Out
0647 A. palmatum 'Novum' 2 3/4 inch $25
0650 A. palmatum atropurpureum 'Nuresagi' 2023
0658 A. palmatum 'Orido Nishiki' 2 3/4inch $35
0665 A. palmatum 'Pixie' 2 3/4 inch $35 Sold Out
0675 A. palmatum 'Ryusen' 1 gallon $65 Sold Out
0682 A. palmatum 'Sazanami' 2 3/4 inch $25 , 1gallon $55 Sold Out
0686 A. palmatum 'Seiryu' 2 3/4 inch $25
0694 A. palmatum 'Shindeshojo' 2 3/4 inch $35 Sold Out
0699 A. palmatum 'Shishio Improved'2 3/4 $27
0745 A. palmatum 'Whitney Red'' 2 3/4inch $27
0749 A. palmatum 'Yuri Hime' 2 3/4 inch $35, 4inch $50
As to the other things, both Bonsai Jack and Stone Lantern are great.