The hinges are Hafele Grass Tiomos 110* Inset clip on 348.31.803 (I initially used the 95* ones but the door didn't open far enough to get the LPG filler onto the refill point) with 0mm mounting plates 348.38.511. The main part of the hinge is screwed to some 12mm hardwood ply and the plates are bolted to an almost 90* strip of 3mm aluminium which is in turn bolted to the body via rivnuts,
The ply is stuck to the plastic cover using PU adhesive.
I used a junior hacksaw blade and a reverse jigsaw blade to cut the plastic cover, cutting down the angles for the most part to leave as much of the cover as possible, replacing the plastic push fit retainers with bolts into rivnuts in the existing holes to keep the top part and side parts of the cover in place once they've been cut off the main cover shape.
I needed to reprofile the metal on the door alignment plates to allow the now opening doors to clear them, just cut it down to match the rubber block shape.
Some cam locks off aliexpress
US $8.3 8% OFF|Black MS725 inner hexagon Cam Lock, cabinet Cylindrical door locks, for Distribution box,Industrial lock-in Cabinet Locks from Home Improvement on Aliexpress.com | Alibaba Group to keep the covers closed with a couple of handles to make it easier to open
US $6.17 22% OFF|Rarelock 10pcs/lot ABS Handle For Padlock Cabinet Lock Box,Lock Catch e-in Locks from Home Improvement on Aliexpress.com | Alibaba Group
I found an air powered finger belt sander with various grades of belt was the best way to shape the plastic and the metalwork, giving really a nice finish, you just have to be very careful and keep offering it up to check progress since you can't put it back on once you've ground it off.
If you need any measurements or close up pics let me know.