1U
CH-1 Aluminum - 16 Ga Al, 10" deep, $68.95 partsexpress.com
EC-1 20 Ga steel 6" deep, $37.09 partsexpress.com
10 series 8" deep, $46.00 par-metal.com
10 series 11" deep, $50.00 par-metal.com
10 series 14" deep, $55.00 par-metal.com
12 aluminum 7,12 62,70 par-metal.com

2U
CH-2 $78.91 partsexpress.com
EC-2 $45.16 partsexpress.com
10 series 8,11,14 $53,55,62 par-metal.com


3U
CH-3 $86.89 partsexpress.com
EC-3 $55.97 partsexpress.com
10 series 8,11,14 60,63,69