uPVC French Doors - Custom manufacturer rec's

Hi
I would love to fit a pair of French Doors instead of the tired slidey patio door that is already fitted downstairs.
The reveal is a helpful 92in or 2330mm , and alot of pre fabricated doors are 94" or 2380mm. Rather than guess the width of the lintel , and screw around with a 9in disc cutter I think it would be easier to get a pair manufactured to fit the hole.

Has anyone found a good cheap online company and used them for windows or doors and been happy with the fit and finish?

Looking for 2 x 750 doors , 2 x 400 sidelights , white pvc , clear glass .

No , I dont want bifolds , no I dont want graphite frames, Yes Im down south. Yes, Ive heard of Fensa