We have one of your 846TQ chassis, and its front handle is damaged. We want to find out part number for front panel control ear assembly for replacement.
http://www.supermicro.com/products/chassis/4u/846/sc846tq-r1200.cfm
The part numbers you need:
Left side:
MCP-290-84605-0V
Silver left chassis handle w/ control panel for SC846
Right side:
MCP-290-84606-0V
Silver right chassis handle for SC846
Or
MCP-290-84610-0B
Black right chassis handle for SC846, 848 w/ front bezel mounting