Hi fried, I had the same problem and came up with this. The one under the FEL arm is a homemade bracket with toolbox from TSC. The second box on the ROPS is mounted with square U bolts from a spare tire holder and some angle iron.
Both are options that I shall consider.
I currently have tools stored in the large diameter loader cross tubes, with plumbers test plugs in each end.
This works great for chain, and larger tools, but I need something for smaller stuff, and both of your mounts could work for me.