Wooden Garage door repair

[nyt]

I have a 1930s wooden garage door with a couple of rotten vertical timbers.

The door is otherwise in reasonably good condition, so I’d ideally like to either:

Source suitable replacement timber and replace the rotten sections myself, if practical — any recommendations for where to buy suitable timber?
Have the door professionally repaired/restored by someone experienced with older wooden garage doors.

Can anyone recommend a good timber merchant, joiner or specialist in the North East London area who might be able to help?

Thanks in advance.

[JoshSm]

Depends what type of timber it is but sizing and shaping those boards isn't hard, at least for anyone with saw/thicknesser/router.

Usual pain points would be whether the door easily comes apart (it will come apart, it just depends on effort/method) and what's your plans to fill the door sized hole while you or someone else fixes it?

If a board is already bad to the point of being entirely replaced and you're confident the door will come apart/go back together you could probably get a section out to measure/check profiles without pulling it entirely to pieces.

[Lotobear]

Did mine myself, not that hard if you are handy

[Lotobear]