Hello again Josie,
Following my email enquiry to Hobby UK parts department, our Chair Rex Wade has since been in discussion with them regarding the window enquiry.
They are advising that because Hobby no longer deal with Parapress, their current chosen manufacturer are quoting a delivery schedule of up to 8 months. They are also suggesting that any tint may not match, plus the existing window fittings would need to be adapted to fit a non Parapress window.
Based on this I would suggest that your best course of action would be to pursue the Parapress window as linked to in my post above.