We don’t offer rackmounts, other than the 1U included in the STL enclosure, but they are available in the open market.
Here is an Amazon link to an affordable Hinged Extendable Wall Mount Brackets. https://www.amazon.com/s?k=4u+hinged+mount&crid=3QHGFJBWMFH1K&sprefix=4u+hinged+mount%2Caps%2C166&ref=nb_sb_noss_2
or 2U Hinged Extendable Wall Mount Brackets.