I also have 2x Invision mounts - I looked them up and I paid literally £30 for each back in 2017 and they're still fine.
These ones, that are a bit more now:
https://www.amazon.co.uk/dp/B0765Y4CT5/ref=pe_3187911_185740111_TE_item
Once height is adjustable initially, it's not something I'll need to change, so one of those T shape ones should be sufficient.