Radek...
If you're refering to the VGO gun mounts on the model jeeps...yes, the Recce Sqn, in particular, used Vickers-K guns mounted on cut-down armoured vehicle PLM mounts. If you look closely at the period pics of the Recce jeeps used at Arnhem (which formed the basis of my research for the 1/6th model recce jeeps) as well as refer to a website that covers Vickers guns (of all types) then the PLM mounts are evident.
Originally, The Squadron's OC - Maj 'Freddie' Gough - requested twin mounted VGO's in order to beef up the firepower of his jeeps due to the coup-de-main assault on Arnhem road bridge that his Squadron was tasked to carry out as part of the overall flawed 'MARKET GARDEN' plan (based on the excellent results of such pairs by the SAS desert raiders). However his request was turned down largely because of resupply ammunition requirements. Hence, most of his jeeps were only fitted with the single gun.
I can't find too much on the PLM mount itself. Another VGO item was the spare magazine containers...whilst the SAS jeeps had their spare drums contained in wooden ammo boxes nestled between the seats of their jeeps, research suggests that many of the recce jeep crews utilised large biscuit tins and these were positioned in the passenger foot wells (inbetween the legs of the machine gunner) for ease of changing out the magazines. Some pics also show the magazines fitted in brackets onto the outside and on the upper dashboard.
I have many books on the Battle of Arnhem, and I scoured every website and jeep book I could find in order to try and get the jeeps accurate (John Fairley's 'Remember Arnhem' was a favourite for research as was Rob van Meel's 'British airborne jeeps 1942-45 - Modifications and Markings). I'm always up for changing out the many modifications made to the jeeps if new research indicates that my results are incorrect.
As such, whilst many of the mods were fun to make...others were purely frustrating based on insufficient or ambiguous information...however, I believe I've done the Recce Sqn justice....not to say that I won't appreciate any feedback if there are indeed things that I've missed...however, every single mod that I could find is on the jeep (right down to the white painted rear dif plate and switch on the rear of the jeep to turn the axle flood light on)