Need door for 1240 opening

[Yanni]

I'm looking to replace an external double door in our factory.
The opening is 1240mm in width and currently has 2 doors each 620mm in width.

As most doors are over 800mm in width could you suggest somewhere I can buy either a narrow door or a standard door of 800mm and a panel that can open around 400mm?

Thanks

 

[God]

In upvc?

 

[Yanni]

No, timber, hardwood...

 

[freddiemercurystwin]

https://www.google.co.uk/?gws_rd=ssl#q=fire+door+blank+2440+x+1220+x+44mm

Door Banks can be cut down to suit, need to cap the cut edges with a hardwood lining though.