If you want to mount the sound card in a rack but you don't have the mounting lugs, we have the original parts from MOTU for you.
MOTU 828 Rack Mounting Kit 1U (2 Ears+4 1/2"Allen screws)
For MOTU interfaces (all types of MOTU 828) that are 1 U high and 19" wide or two 9.5" wide. You can find it on eBay here.
This kit contains the two rack mounting ears and the four 1/2" Allen Head screws. Note that each part has a circular recessed hole for Allen Head, this should be facing out. You must be careful that you have screws that are not metric and the allen key must be special Allen Wrench imperial 7/64". Normal allen keys from commercially available sets do not fit. If you need that key, you can find it on eBay here.
For two 9.5" units you need a coupling piece between them that is not in this kit.
You can find that coupling part on eBay here.
All components are brand new!