Should be easy enough to fabricate a set. Here's the deal: I could use a strip (rail) of L shaped aluminum, which I am confident would be strong enough as even tho the mixer is now in a rack case, I still handle all my equipment gently and with plenty of care. NOTHING gets slammed around. OR: Instead of a strip of L shaped aluminum, I'm thinking I could simply buy 4 steel 'L' brackets for each side. Probably not quite as strong as the strip aluminum but probably strong enough.
Any thoughts and/or suggestions appreciated.