It is possible to paint stain polish wax and french polish these doors after preparing (sanding and cleaning) them. Sold wood doors without hinges or handles without holes ready to fit. (you may need DIY skill to fit this product).
eBay
6.5 X 4FT Lockable Metal Garden Shed with Foundation Kit Sliding Doors Grey
Aliexpress UK
600 X 575 DOOR. KITCHEN DOOR DARK WALNUT COLOUR.
eBay
5ft X 3ft Garden 2-Bin Corrugated Steel Rubbish Storage Shed W/Locking Doors Lid
Aliexpress UK
You will need to buy and fit a handle, hinges and catches. Made from mdf and covered with an ivory vinyl. The door is new without defect or hole except for hinge recesses drilled in the back. Hinge recesses on the rear of the door are 35mm for standard Blum hinges the position is standard 87m from the top and bottom of the door to the centre of the hole.
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Metal Push Button Remote Control Transmitter ABCD 4Button 433MHz Universal 4 Buttons Garage Door Opener Remote
Aliexpress UK
TO FIT 300 x 720mm. LIGHT OAK COLOUR VYNIL WRAPPED. KITCHEN DOOR.
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40*120cm PC Material Front Door Window Awning Canopy Sun Shade Rain Cover Wall Mounted Patio Canopy
Aliexpress UK
KITCHEN DOOR WALNUT COLOUR.
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Outsunny 3 x 3 Meters Canopy Metal Wall Gazebo Awning Garden Marquee Shelter Door Porch, Cream White
Aliexpress UK
500 WIDE x 575mm HIGH PLUS 500 WIDE X 140 HIGH DRAW FRONT. THESE HAVE BEEN IN WAREHOUSE FOR A FEW YEARS SO MAY BE DUSTY.
eBay
Home gardening, mushrooms, vegetables, small succulent plants, insulation, moisturizing, waterproof greenhouse shed, front door
Aliexpress UK
THESE HAVE BEEN IN WAREHOUSE A WHILE SO MAY HAVE SLIGHT MARKS /DUSTY ETC.
eBay
4 X 6ft Plastic Garden Shed with Floor, Window and Lockable Door
Aliexpress UK
400mm White Gloss Slab Kitchen Doors. 700mm x 396mm wide x 15mm thick. Chipboard
eBay
Outsunny 5ft x 3ft Metal Garden Storage Shed, Outdoor Tool Shed with Sloped Roof, Lockable Door for Tools, Equipment, Light Grey
Aliexpress UK