Can this mismeasured door be made to fit?

Jjah

Hi all,

After receiving eye watering quotes for patio doors and a composite front door, I am looking to save money.

I have a porch with an opening of 870 x 2200.

This is where I wish my front door to go.

It is currently set back inside by 2 foot with 2 side panels and a top panel.

I wish to replace this entirely and instead put a door where my porch is to make my hall way bigger.

Thing is, as it is not a standard sized opening, if I bought this discounted door from Doors 4 U, can a fitter somehow make it fit?

https://doors-4u.com/product/red-composite-traditional-door-870-x-2025-2310-mm-22a19/

Thanks in advance!

Jjah

Also, what would be a reasonable quote just for fitting?

Cheers