The Meike MK-A9 II G costs $54.99 in the US and £54.99 in the UK.
If you would prefer the convenience of an l-bracket and hand grip combined then I’d recommend the SmallRig (LCS2417) L-Bracket instead.
I’m using the SmallRig on my own a7R IV and have zero complaints. Unlike many other SmallRig l-brackets this one thankfully does not rotate on the camera body. You can also remove the l-part and just use it as a grip extension if you wish.