I have just bought the logic L198CFW20 to build a keezer. The dimensions are 854mm height, 803mm width and 557mm depth.
I cut out some circles of the keg size and you can fit 3 in the freezer part and one just on the shelf above the compressor ( might knock up a bit of a wooden support for the keg on the shelf as it does overhang a bit) Photo below.
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I think the keg on the compressor shelf might even fit in without a collar but I intend to build one so that I don't invalidate the warranty or even worse damage the freezer.
At the time of posting it's currently £40 off usual price and comes in at £179.99