Pimping up internal doors

Hi all,
not been on here for ages, but i need your help now.

We want to change our internal doors, however almost all of them are non-uniformed widths.
Got some at 725mm wide and some at 824mm wide. They are standard 1981mm high.
Standard sizes near to those as far as i can see are 762, 868. Can get 838, but would need to trim about 7mm off each edge.
So, was wondering whether its worth trying to spruce the existing ones up to make them look similar to what we wanted to replace them with. Buying bespoke sizes would likely cost way over £100 a door....and that aint happening, especially as i'll then have to chisel/drill for hinges and furniture.
Thought about adding some panelling to the faces so they something like these.
Obviously not near the edges so it doesn't thicken the rebate parts of the door.
I could use lengths of mdf stuck to the face, caulked up and then the whole thing painted perhaps.
Open to suggestions/advice.

Thanks

Standard metric doors are 726mm and 826mm wide.

I very much doubt that you'll be able to achieve anything looking like the doors you link to. For a start on the inside of the door adding 4mm to the face of the door (about the thinnest thickness of MDF useable) will make the face of the door sit proud of the door casing by that amount which may cause the door to bind on its' hinges and TBH will just look plain odd unless you also remove the architraves on that side, build-up the faces of the casing by the same amount and refix the architraves. The other side, with an obvious rebate round three edges will look even odder to my mind especially as it will be all but impossible to apply the skin without leaving an uneven shadow line where the door meets the rebate. If your casings have planted-on stop laths (as opposed to a worked rebate) it might be possible to remove the stop laths, apply a thin skin of material the door then refix the stop laths to achieve the required effect. In any case you'll still have to deal with redrilling for the door hardware (handles, escutcheons, etc) , the hinges will need to be reset (to prevent binding) which in turn means that patches will be needed on both the jambs and the door casings and the edges of the doors are always going to be problem area unless your doors are near pristine. I've done some door reskinning jobs in the past but it has always been skinning of flush doors with decorative laminate both sides and only ever on casings with planted-on stop laths. I wouldn't want to tackle what you are proposing

Thanks fella. I always thought it would be more hassle than its worth, but tried to look on it as a 'project'. That said, i don't really have the time.
foxhole, i wasn't aware that 726 and 826 were standard sizes. I haven't come across any in the regular shed stores. Could you point me in the right direction please?

Just noticed this old thread.
//www.diynot.com/diy/threads/does-howdens-b-q-anyone-else-do-726mm-w-x-1980-h-6-p.289914/